Question # 1

The percentage uncertainty in measuring the volume of sphere measured by calipers callipers is when r = 2.25 ± 0.01 cm with least count ± 0.01 cm

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46.7 ± 0.5 cm²

47.7 ± 0.5 cm³

47.7 ± 0.6 cm³

477.6 ± 0.6 cm³

If radius of droplet is halved then its terminal velocity in viscous medium

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Doubles

Becomes halved

Becomes one fourth

Becomes four times

Bulk modulus for ice is

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5

6

7

8

Shear modulus for diamond is

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156

353

450

477

Amorphous solids:

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Have definite melting point

Are called glassy solids

Have no definite meting point

Both B and C

Both A and C

Reciprocal of bulk modulus is called

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Shear modulus

Compressibility

Young s modulus

None

Laws of motion are not valid in a system which is

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inertial

non-inertial

at rest

moving with uniform velocity

When the velocity of the car is constant. The velocity time graph is a

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Straight line

straight line rises the same height for equal intervals of time

Horizontal straight line

None of these

The changes which involve friction or dissipation of energy are reversible through

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Conduction

Convection

Radiation

All of these

High energy physics is the physics of

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Nucleus

Subatomic particles

Plasma physics

Astrophysics

The optical fibre has a layer over the central layer is called cladding of refractive index

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High

Low

Very high

None of these

The weight of 10 kg body falling freely is

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zero

98 N

9.8 N

10 N

An Earth satellite in a circular orbit of 384000 km. What is its velocity in that orbit take me = 6.0 × 1024 Kv R_e = 64000 km

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2.57 kms^-1

1.1 kms^-1

1.01 kms^-1

1.07 kms^-1

Choose an answer

At constant temperature, if the density of the gas is increased, its pressure will:

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Decrease

Increase

Remain unchanged

None of these

The cross product of parallel vectors has magnitude

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Maximum value

Minimum value

Zero

None of these

The methods used for the conversion of biomass into fuels are

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Fermentation

Direct combustion

Direct sunlight

a & b

Beta particles have less ionizing power than that of alpha particles because:

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Their smaller energy

Their smaller mass

Their smaller density

Their smaller charge

A convex lens is dipped in a liquid whose refractive index is equal to the material of the lens. Then its focal length will become

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Infinite

Zero

Extremely small

Extremely large

The substances in which atoms cooperate with each other in such a way so as to exhibit a strong magnetic effect, are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

The relation between displacement of the mirror 'L' and wavelength λ of the light used

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L = 2mλ

L = λ/2m

L = mλ/2

None of these

The characteristics of steady flow is

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Non-viscous

Incompressible

Streamline

All of these

If a machine does work at the rate of 1.0 joules in energy two 5 seconds, then its power is said to be

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0.25 watt

0.20 watt

1 watt

None of these

The relative permitivity for vacuum is

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1

2

1.002

1.004

The sky appears blue because

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Red light is absorbed

Blue light is scattered the most

Blue light is absorbed

It is its natural color

The critical temperature T for is

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1.6 K

2.71 K

3.72 K

2.82 K

Flow rate has SI unit

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m²/s

m/s

m³/s

m³/s²

A photo cell is based on:

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Compton effect

Pair production

Photo cell

All of these

Spokes used in a bicycle wheel increase its

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Moment arm

Moment of inertia

Acceleration

Velocity

If the earth stop spinning the apparent weight of the body on the surface of the earth

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Increases

Decreases

Remain same

None of these

The magnetic moment of electron is

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9.27 x 10^-24 joule/Tesla

9.27 x 10^-24 Tesla/joule

9.27 x 10^-23joule/Tesla

9.27 x 10^-23Tesla/joule

The measure of deformation in a certain solid due to the action of stress is called

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Hooke's law

Mechanical advantage

Stress

Strain

Reverse process of vector addition is called

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Negative of a vector

Subtraction of vector

Resolution of a vector

Multiplication of a vector

The viscosity of red blood cells increase than water is from

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2 to 3 times

3 to 4 time

4 to 5 times

3 to 5 times

Which of the following cannot have an effect on the weight of an object?

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The distance of the object from a planet

The acceleration of the object

The placement of the object on a different planet

The mass of the object

A science student takes 100 observations in an experiment Second time he takes 500 observations in the same experiment By doing so the possible error becomes

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5 times

1/5 times

Unchanged

None of these

For the monochromatic beam of X-rays, the crystal planes in a lattice act like a

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perfect absorbers

boundary

mirror

none of them

In order to observe interference , the interfering beams must be

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monochromatic

coherent

either of them

both of them

Multimode step index fibre has a core of relatively larger diameter such is

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125 μm

175 μm

50 μm

100 μm

Gain of operational amplifier is independent of;

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Internal structure

External Structure

Batteries

Potential changes

Temperature remain constant the volume of given mass of a gas is inversely proportional to the pressure applied on it. it is called

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General gas law

Boyle's law

Charles law

None of these

The size of the molecules in comparison with the separation between the molecules is

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Small

Very small

Extremely small

None of these

Examples of polymeric substances are:

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Plastic

Synthetic rubbers

Zirconia

All of these

Both A and B

The number of significant figures in 5850 is

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3

4

5

2

The dimensions of torque are

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ML²T^-2

MLT²

MLT^-1

ML²T²

The volume of liquid flowing per second out of an orifice at the bottom of a tank does not depend upon

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The area of the orifice

The height of liquid above the orifice

The density of liquid

Both A and C

If a ball comes back to its starting point after bouncing off the wall several times, then its

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total displacement is zero

average displacement is zero

none of them

both of them

De-Broglie received the Nobel prize in

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1929

1937

1928

1924

Viscosity of gas with increase in temperature

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Decreases

Increases

No change

All

The total change in momentum of the isolated two ball system is

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Maximum

Minimum

Zero

None of these

The valence energy band may be either

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Completely filled

Partially filled

a and b

All of them

When a body moves with a constant speed along a circle

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No work is done on it

No acceleration is produced in the body

No force acts on the body

Its velocity remains constant

Polarization of material in an electric field is a

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Permanent phenomenon

Purely a temporarily phenomenon

Time dependent phenomemon

None of these

The conductivities of conductors (metals) have

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10⁵ (Ω)^-1

10⁷ (Ωm)^-1

10⁸ (Ωm)^-1

10⁹ (Ωm)^-1

In case of point source of light, shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

When the object is closer to eye or near point, the image becomes

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Sharp

Clear visible

Blurred

None of these

Speed of light in vacuum is

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0 ms^-1

3 x 10⁸ms^-1

1.5 x 10⁸ms^-1

None of these

When light travels from one medium to another which are separated by a sharp boundary the characteristic which does not change is

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Velocity

Wavelength

Frequency

Amplitude

The high blood pressure is

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100 torr

110 torr

120 torr

130 torr

The quality of the moving body is called

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Motion

Momentum

Force

None of these

An optical fiber carries data in the form

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Lights signals

Sound signals

A wave

A particle

Electric current is defined as:

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Flow of charges through conductor

Rate of flow of charges through conductor

Flow of electrons

Flow of protons

Under what circumstance would a vector have components that are equal in magnitude ?

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45^o , 145^o , 245^o

135^o , 225^o

45^o , 135^o , 225^o and 315^o

None of these

Rectangular components of a vector are those which have angle between them

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30^o

60^o

90^o

0^o

If a source of emf is traversed from positive to negative the potential change will be:

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Positive

Negative

Zero

Constant

The mks unit of Mechanical Equivalent of heat is

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Joulex calorie

Joule/ calorie

Calorie x erg

erg/ calorie

The initial velocity of a body moving along a straight line in 7 m/s.It has a uniform acceleration of 4 m/s².The distance covered by the body in the 5th second of its motion is

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25 m

35 m

50 m

85 m

Young's modulus for copper is

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70 x 10 Nm^-2

91 x 10 Nm^-2

110 Nm^-2

None of these

Einsteins theory donot tell the force of gravity acting on bodies instead, bodies and light maces along geodesies in

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Space time

Straight space time

Curved space time

All of these

The total linear momentum of an isolated system remains

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Constant

Variable

Zero

None of these

The charged nucleus of an atom itself spins, it's magnetic field

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equals the field produced by orbital electrons

greater than the field produced by orbital electrons

much weaker than the field produced by orbital electrons

none of them

If we keep the moment arm constant and increase the applied force, then the torque will

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remain the same

decrease

increase

all of them

When the velocity of a body is increasing, the acceleration produced is

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No acceleration produced

Negative acceleration

Positive acceleration

None of these

Deep water almost runs still when surface water flow in rivers.What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

Torque of a force is a vector quantity, its direction is determined by

Choose an answer

Right hand rule

Knowing the direction of F

Knowing the position of origin

none of these

The product of force and time of impact force is called

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Momentum

Impulsive force

Impulse

Rate of change of momentum

Those solid which breaks soon after crossing the elastic limit are called

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Amorphous

Glassy solid

Crystalline solid

Brittle

The ratio of the numerical values of the average velocity and average speed of a body is always.

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Unity

Unity or less

Unity or more

Less than unity

Point out the element having atomic mass = 63.5465:

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Br

Zn

Cu

Ni

Work done is expanding gas under adiabatic condition results

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Increase in temperature

Decrease in temperature

No change in temperature

None of these

Laws of reflection and refraction can also be explained by:

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Particle nature of light

Quantum nature of light

Wave nature of light

Complex nature of light

Which one the following gives three regions of electromagnetic sepctrum in order of increasing wavelength?

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Gamma rays, micro waves, visible light

Radio waves, ultraviolet waves, X-rays

Ultraviolet rays, Infrared rays, micro waves

Visible light, gamma rays, radio waves

The SI unit of momentum is

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Kgms^-1

Kgms^-2

NS

A and C

The density of human blood is equal to that of

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Oil

Glycerin

Honey

Water

Consult page 50 of your text and trick the correct statement.

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Velocity of x-rays is greater than velocity of light

Velocity of right light is less than velocity of radio waves

Velocity of light, x-rays and radio waves is the same

None of the above is correct

The young s modulus of a wire of length L and radius r is Y if the length is reduced to L/2 and radius to r/2 its young s modulus wire be

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Y / 2

Y

2 Y

4 Y

A body moves a distance of 10 m along a straight line under the action of a force of 5 Newton.If the work done is 25 joules. the angle which the force takes with the direction of motion of the body is:

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0°

30°

60°

90°

If V denotes volume of the liquid coming out of a pipe per second, v is velocity and A as area of the pipe, then the correct formula will be:

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V = v x A

v = V x A

A = v x V

None of these

In an inkjet printer, the toner drops are

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Charged

Not charged

Charged and deflected

None of these

'S' is the arc length and after one revolution it becomes

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2π

2π/r

2πr

None of these

The rate at which the battery is supplying the electrical energy is the:

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Power output

Electrical power

Power input

Both A and C

An average energy used by the car-from petrol in its life time

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1 × 10⁹ J

1 × 10¹⁰ J

1 × 10¹¹ J

1 × 10¹² J

The dimensions of velocity are

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[LT]

[LT²]

[LT^-1]

[LT^-2]

The magnetic field produced due to the current in a straight wire is proportionalto the :

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Electric current

Conducting material

Length of the wire

Diameter of the wire

The light source in the transmitter can be either

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Light emitting diode

Semiconductor laser

Light emitting in an invisible infra red

All of these

To decrease timing uncertainly

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Increase number of vibration

Decrease number of vibration

Increase length of pendulum

Decrease length of pendulum

G.P Thomson revealed:

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Particle nature of electron

Dual nature of electron

Wave nature of electron

Electromagnetic nature of electron

The terminal velocity of for a water droplet of radius 10^-5 m is of the order of

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1 cm/s

1 mm/s

1 nm/s

1 μm/s

The organic substances which shows optical rotation when they are in solution

Choose an answer

Tartaric acid

Sugar

Alcohol

a and b

The work done is stretching a spring of force constant 20 Nm^-1 by an amount 30 cm is

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0.6 J

0.9 J

1.2 J

1.5 J

An electric force which hold the charges to make atoms and molecules

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Positive charges

Negative charges

Neutral charges

a & b

In relation Vt = 2gr²ρ/9η. Terminal velocity is directly proportional to

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r

r²

r³

None of these

The unit of power of a lens is

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Meter

Watt

Horsepower

Dioptre

An object is placed between two parallel mirrors the number of images formed is

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2

4

8

Infinite

The results of mechanical tests are usually expressed in terms of

Choose an answer

stress

strain

stress and strain

neither stress nor strain

A 1500 kg car has its velocity reduced from 20 ms^-1 to 15 ms^-1 in 3.0 S. How large was the average retarding force

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- 4.5 KN

- 2.5 KN

- 3.7 KN

- 4.3 KN

A satellite communication system can be set up the geo-stationary orbits are

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2

3

5

1

The precision of measurement in physics depends

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Average values

Least count of instrument

Error free instrument

b and c

The typical speed of 100 meters dash

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2 ms^-1

4 ms^-1

10 ms^-1

12 ms^-1

X-ray diffraction has been very useful in determining structure of

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Hemoglobin

Double helix structure of DNA

Blood speed

a and b

Nm^-2is approximately called:

Choose an answer

Telsa

Weber

Pascal

Watt

Guass

When two lights waves travelling in the same direction are in phase at any point, they producing

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constructive interference

destructive interference

dispersion

polarization

In deriving Bernoulli's equation, it is assumed that the fluid is

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Incompressible

Non-viscous

In a steady state

All of these

The projectile attains maximum horizontal range when it is projected at an angle of

Choose an answer

30°

45°

60°

75°

If 'd' is the total displacement of the body in time 't' then the velocity during this interval t is

Choose an answer

Initial velocity

Variable velocity

Average velocity

None of these

If C and R denote capacity and resistance,the dimensional formula of CR is

Choose an answer

M°L°T^-1

M°L°T°

Not expressible in terms of MLT

After elastic limit the shape of graph is

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Curved

Straight Line

Saw tooth

Arbitrary

The spacing between lines of diffraction grating is

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Opaque

Transparent

Semi-transparent

None of these

In Michelsion's interferometer the path difference is varied by moving

Choose an answer

compensatory plate

moveable mirror

fixed mirror

telescope

The velocity of rain drop attains constant value because of

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Surface tension

Upthrust of air

Viscous force exerted by air

Air currents

If a person with a spring balance and a body hanging from it goes up and up in an airplane then the reading of the weight of the body as indicated by the spring balance will

Choose an answer

Go on increasing

Go on decreasing

First increase and then decrease

Remains the same

The positions of two aeroplanes at any instant are at A (2, 3, 4) and B(5, 6, 7) from the origin in km. Find the distance between the two aeroplanes.

Choose an answer

3.2 Km

4.9 Km

5.0 Km

5.2 Km

Scientific notation which can be expressed in the

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Negative powers

Powers of ten

Decimals

None of these

Light waves produce interference when

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source are monochromatic

source are phase coherent

sources are close together

all of them

In newton's rings see through the reflected light, centeral spo is:

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Bright

Dark

Either of the Two

None of these

The fiber of which refractive index ______ gradually as move from central core to its periphery is called ______ index fiber

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Decreases, multi-mode graded

Increases, single mode step

Either of A or B

Increases, multi-mode step

We are living in the age of

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Technology

Information technology

Space age

None of these

The temperature at which the reading of Fahrenheit thermometer will be double that of a centigrade thermometer is

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160°C

180°C

140°C

100°C

A process in which no heat enters or leaves the system is called.

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Adiabatic process

Isothermal process

Isochoric process

None of these

For total internal reflection to take place, the angle of incidence must be ______ than critical angle and the light should travel from ______ to ______ medium

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Greater, rarer, denser

Smaller, rarer, denser

Smaller, denser, rarer

Greater, denser, rarer

The electric field due to an infinitely long thin wire at a distance R varies as

Choose an answer

1/R

1/R²

R

R²

Power is defined as

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P = ΔV/Δt

P = ΔW/Δt

P = mV/t

P = mt/V

A fly is sitting on the objective of a telescope pointed towards the moons what effect is impacted in a photograph of the moon taken through the telescope

Choose an answer

The entire field of vision is blocked

There is image of the fly on the photograph

There is no effect at all

There is the reduction in intensity of the image

In Michelsion's interoferometer, if the moveable mirror is moved through a distance 0.05 mm and 500 finges are observed, then the wavelength of light used is

Choose an answer

1 x 10^-7m

2 x 10^-7m

1.5 x 10^-7m

1 x 10^-8m

The consumption of energy by a 60 watt bulb in 2 sec is

Choose an answer

60 J

120 J

30 J

0.2 J

Experimental demonstration of wave nature of light was given in 1801 by

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New ton

Maxwell

Thomas young

Huygen

Two point charge +3μC and +8μC repel each other with a force of 40 N if a charge of -5μC us added to each of them then the force between them will become

Choose an answer

-10 N

+10 N

+20 N

-20 N

The young s modulus for a perfectly rigid body is

Choose an answer

Zero

1

Infinite

None of these

A temperature at which the material losses its orderliness is know as

Choose an answer

Ambient temperature

Curie temperature

Highest temperature

None of these

Acceleration means the speed of the body is

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Increasing

Decreasing

Just stop

None of these

A body is moving with a uniform speed along a straight line.Its angular momentum with respect to a fixed point away from the line

Choose an answer

Increases as the body moves away from the point

Decreases as the body moves away from the point

Is zero

Is constant and does not depend on the position of the body

The horizontal velocity component in projectile motion is

Choose an answer

Zero

Constant

Maximum

None of these

Which of the following frequency ranges includes most of the electromagnetic waves emitted by the ultra - violet tubes used in a sun bed?

Choose an answer

5 x 10⁵ to 5 x 10⁸ Hz

5 x 10⁸ to 5 x 10¹¹ Hz

5 x 10¹¹ to 5 x 10¹⁴ Hz

5 x 10¹⁴ to 5 x 10¹⁷ Hz

Conditions for interference are that the two sources should be coherent and:

Choose an answer

At the far off distance

Close together

Coinciding

None of these

Two masses m₁ and m₂ have equal momentum their kinetic energies are in ratio of

Choose an answer

m₂: m₁

m²1 : m₂²

m₁: m₂

m₂^{2 :}m²1

The velocity-time graph of a car is a straight line which rises the same height for equal intervals of time, if it moves with

Choose an answer

zero velocity

constant velocity

zero acceleration

constant acceleration

Which one of the following can act approximately as a source of monochromatic light

Choose an answer

Neon lamp

Fluorescent tube

Sodium lamp

none of these

The light source in the transmitter can be

Choose an answer

semiconductor laser

LED

both of them

either of them

A particle is moving along a circular path of radius 5 m with uniform speed 5 m/sec what will be the magnitude of centripetal acceleration when the particle completes half revolution

Choose an answer

10π m/sec²

5 m/sec²

10/π m/sec²

Zero

Everything in the vastness of space is in a state of

Choose an answer

Rest

Motion

Perpetual motion

None of these

The maximum kinetic energy of emitted photoelectrons depends upon:

Choose an answer

The intensity of incident light

Frequency of incident light

Metal surface

Both frequency of incident light and metal surface

A new type of optical fibre in which central core has high refractive index and its density gradually decreases towards its periphery is called

Choose an answer

Step index fibre

Multimode step index fibre

Multimode graded index

None of these

The moment of linear momentum is called

Choose an answer

Impulse

Torque

Angular momentum

Couple

The capacity of television channels INTELSAT VI satellite is

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2

3

10

20

A flowing liquid possesses

Choose an answer

K.E

P.E

Pressure Energy

All

Rainbow is formed due to combination of

Choose an answer

Dispersion and total internal reflection

Reflection and refraction

Dispersion and focusing

Refection and scattering

In the thin film, the path difference between the two reflecting waves depends upon

Choose an answer

thickness of film

nature of film

angle of incidence

all of them

A tank containing water has an orifice in one vertical side. If the centre of the orifice is 10 m below the surface level in tank, then velocity of efflux is

Choose an answer

44 ms^-1

14 ms^-1

10 ms^-1

49 ms^-1

The two thin tubes which show most correctly the behavior of water are

Choose an answer

1 and 2

2 and 3

3 and 4

4 and 5

The stress which increase the length in one dimension only is called

Choose an answer

length stress

only have compressive stress

Have both tensile and compression stress

None of them

In cause of YDS experiment, the distance between adjacent bright fringes is given by

Choose an answer

Δy =λL/d

ΔY = L/λd

ΔY =λ/L

None of these

When a germanium atom is doped with phosphorous atoms it becomes

Choose an answer

N-type semiconductor

p-type semiconductor

An insulator

None of them

When a body is subjected to some external force, deformation is produced in:

Choose an answer

Shape

Length

Volume

Any of these

None of these

At high speed and for long trajectories the air friction is

Choose an answer

Negligible

Equal to gravity

More than gravity

None of these

Energy required to accelerate a car from 10 ms^-1to 20 ms^-1compared with that required to accelerate from 0 to 10 ms^-1is

Choose an answer

Twice

Three times

Four times

Same

Polaristion is a phenomenon associated with a certain type of wave.

Which condition must be fulfilled if the wave is to be polarised?

Choose an answer

It must be a longitudinal wave

It must be a light wave

It must be a transverse wave

Frequency of red colour as compared to that of violet colour is:

Choose an answer

Equal

Smaller

Greater

None of these

A rocket carries its own fuel in the form of

Choose an answer

liquid only

liquid or solid

liquid and solid

liquid or solid and oxygen

Find the range of the projectile, having speed 30 ms^-1in a direction 30^o above the horizon

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50 m

80 m

90 m

100 m

For a normal AC cycle, during T/2 to T the diode act as:

Choose an answer

Open switch

full wave rectifier

Close switch

All are correct

At what point/points in its path does a projectile have its maximum speed ?

Choose an answer

At the point of projection

At the point where its strikes the ground

Both

None of these

A pure semiconductor has:

Choose an answer

An infinite resistance at 0^oC)

A finite resistance which does not depend upon temperature

A finite resistance which decreases with temperature

A finite resistance which increase with temperature

If the tensile force is suddenly removed from a wire then its temperature will

Choose an answer

Decrease

Increase

Becomes zero

Remain constant

Which of the following pairs of electrical units are the units equivalent?

Choose an answer

Coulomb; As^-1

Farad ; C^-1V

Pascal: Nm^-2

Volt ; JC

A car is moving high velocity when it takes a turn.A force acts on it outwardly because of

Choose an answer

Centripetal force

Centrifugal force

Gravitational force

All of these

One electron volt is equal to

Choose an answer

1.6 × 10^-19 C

1.6 × 10^-16 J

1.6 × 10^-19 J

1.6 × 10^-27 J

The principle of rocket motion is based on the

Choose an answer

First law of motion

Second law of motion

Third law of motion

None of these

Which one of the following phenomenon cannot be explained by the wave theory of light ?

Choose an answer

Reflection

Refraction

Photoelectric effect

Diffraction

A point on the surface of the mirror where principle axis meets is called

Choose an answer

Focus

Centre of curvature

Pole

Aperture

At 0k whihc of the following properties of a gas wiil be zero?

Choose an answer

Kinetic energy

Potential Energy

Vibrational Energy

Density

The magnitude of work is

Choose an answer

W = Fd cos θ

W = Fd

W = dF cos θ

All of these

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3 N.The force between A and B when the charges on them are doubled and distance is halved

Choose an answer

1.92 N

19.2 N

12 N

0.192 N

The range of the projectile means a body covers horizontal distance which is

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Maximum

Minimum

Distance

None of these

When two objects come to common temperature, the body is said to be in:

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Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

An atom in which there is a resultant magnetic field behave like a

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Tiny magnet

Magnetic dipole

No magnet

a and b

Earth receivers huge amount of energy directly from

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Water

Moon

Sun

None of these

When a strength changes the length of a body,it is called

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Tensile stress

Shear stress

Compressional stress

The motion of a body in a straight line is the motion in

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one dimension

two dimensions

three dimensions

four dimensions

Cladding means a layer of ______ refractive index over the central core of ______ refractive index

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Lower, lower

Higher, lower

Lower, higher

None of these

Which of them is not a physical quantity

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Density

Impulse

Energy

Kilogram

In the thin film, the path difference of two reflected ray depends upon

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Thickness of the film

Nature of the film

Angle of incidence

All of these

Fight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

SI unit of potential difference is volt it can be written as

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JC^-2

JC^-1

JC

J.A

Which of the following is the smallest unit?

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Millimeter

Angstrom

Fermi

Metre

The first law of thermodynamics defined as

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Conversion of heat energy into mechanical energy

Conversion of heat energy into vibrational energy

Conversion of heat energy into translational energy

All of these

The bottom of a container filled with liquid appear slightly raised because of

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Refraction

Interference

Diffraction

Reflection

When the fluid is incompressible, for which the density is

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Constant

Change

Both

None of these

As 1 ohm x 1 farad = 1 second For MΩ x PF =

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Second

ms

μ s

Ms

Energy can be added to a system even though heat transfer is

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Maximum

Minimum

Zero

None of these

Selenium is an

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Insulator

Conductor

Semiconductor

Photo conductor

The oil drop gets charged when it

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Pass through the medium

Pass through the atomizer

Light falls on it

All of them