Question # 1

When a force of 4 Newton is applied on a body of mass 2 kg, the acceleration produced in it will be:

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2 ms^-2

4 ms^-2

8 ms^-2

6 ms^-2

Moon is nearly _________ km away from earth.

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6 x 10²⁴

380000

199.62 km

30000

Law of motion was presented by the scientist.

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Einstein

Newton

Galileo

Archimedes

The SI unit of thermal conductivity is

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Wm K-1

Wm-1K

Wm-1K -1

WmK

Unit of thermal conductivity is .

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Wmk

W m^-1 K^-1

Wm

None of these

Rate of doing work is called:

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Energy

Torque

Power

Moment

If heat Q flows in time 't' through some metal then rate of flow of heat is defined as

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Flow of heat = 2Qt

Flow of heat = Q/t

Flow of heat = t/Q

Flow of heat = Qt

ΣF=0 is __________ condition of equilibrium:

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1st

2nd

Unstable

Stable

Least count of digital vernier callipers is.

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0.01 cm

0.01 mm

0.1 mm

0.1 cm

The formula of y component of force ' F ' is:

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F cos 𝜽

F Sin 𝜽

F tan 𝜽

Tan^-1 𝜽

If the mass of a body is 'm' and change in its temperature isΔT, then the heat absorbed or released is given by

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ΔQ = cmΔT

ΔQ = mΔT

ΔQ = 2cΔT

ΔQ = cmΔT2

What is the voltage across a 6Ω resistor when 3 A of current passes through it?

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2 V

9 V

18 V

36 V

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

The unit of intensity of sound:

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wm^-1

wm

wm^-2

wm^-3

According to ohm’s law V= :

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I²R

IR²

IR

I/R

The frequency of silent whistle is:

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20,000 Hz - 25000 Hz

2000 Hz - 25000 Hz

200 Hz - 2000 Hz

25000 Hz

What is fitted in telephone receiver?

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Electromagnet

Diaphragm

Both a and b

None of these

The ration of external force applied on the spring to displacement is called:

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Hooke’s law

Constant

Spring constant

Force

Which particles are nucleons?

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Electrons and protons

Protons and neutrons

Electrons and neutrons

Electrons and positrons

J.J Thomson observed deflection of cathode rays in:

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1895

1896

1897

1998

According to Coulomb's law , what happens to the attraction of two oppositely charged objects as their distance of separation increases?

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Increase

Decreased

remain unchanged

can not be determined

When frequency of sound wave is increased, which of the following decreases:WavelengthPeriodAmplitude

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(i) Only

(iii) Only

(i) And (ii) only

(i) And (iii) only

One revolution is equal to.

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90^o

180^o

360^o

270^o

The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

A body has P.E. = mgh, when it is at height 'h' from the ground. At the point at the distance 'x' below from the top its P.E. with

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mgh

mgx

mg(x-h)

None of these

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

The light signal in Opticla fiber must be regenerated by advice called.

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Regenerator

Generator

Repeater

Diode

Angular acceleration is produced by

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Power

Torque

Pressure

Force

The ratio of size of image and size of object is

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Focal length

Magnification

Resolving power

Principle focus

Stars moving away from Earth show a

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Green shift

Blue shift

Red shift

Yellow shift

The types of optical fibres are

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Three

Four

Five

Six

Two vector can be added by simple arithmetical method when they are at an angle of.

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120^o

90^o

0^o

45^o

The diastolic pressure of a normal healthy person is.

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120 torr

110 torr

100 torr

75-80 torr

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

The dimension of stress is

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[MLT^-1]

[ML^-1T]

[ML^-1T^-1]

[ML^-1T^-2]

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

Compton effect proves.

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Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

A one microfarad capacitor of a TV is subjected to 4000 V potencial difference.The energy stored in capacitor is:

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8 j

16 j

4 x 10^-3j

2 x 10^-3j

For which material medium, force between two charged particles is maximum.

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Ammonia

Germanium

Mica

Teflon

Radius of first Bohr's orbit is.

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0.053 nm

0.053 mm

0.053 micro meter

0.053 m

When the medium is insulator the elecrostatic force between the charges is

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Decreased

Zero

Increased

None of above

Magnetic induction can be measured in units of.

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Tesla

Gauss

Weber/m2

All of the above

The Balmer series is obtained when all the transition of electrons terminate on

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1^st orbit

2nd orbit

3rd orbit

4th orbit

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above