Question # 1

A wave source of frequency 1,000 Hz emits waves of wavelength 0.1 m How long does it take for the waves to travel 2500 m.

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4 s

25 s

40 s

100 s

What is the smalless total resistance using only a 6 ohm and 12 ohm resistors.

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2 Ohm

3 Ohm

4 Ohm

6 Ohm

Two tuning forks of frequencies 260 Hz and 257 Hz are sounded together the number of beats produced per seconds is.

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1

3

4

257

The centre of gravity of a body is

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The centre of the body

The point at the mass of the body acts

The point at which the whole weight of the body acts

The point of rotation

Surface tension of a liquid may be defined as

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Heat energy per unit area

P.E. per unit area

surface energy per unit area

K.E. per unit area

How are the electrons produced in a cathode ray tube.

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By applying an electric field to the x plates

By heating a metal filament

By ionization of the air

By radioactive decay

The pressure change in a confined incompressible fluid is transmitted equally in all directions throughout the fluid and to the walls of the container This is.

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Archimedes principle

Kirchhoff's law

Pascal's law

Ampere's law

The angle of incidence that causes the refracted ray in the rarer medium to bend though 90^o is called.

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Critical angle

solid angle

Plane angle

Acute angle

Which of the following is not essential for the free oscillations of a mass attached to a spring.

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Elasticity

Gravity

Inertia

Restoring force

Every point on any wave front can be considered as a new source of waves This statement is known as.

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Huygen's wave theory

Michelson's wave theory

Remain's effect

Rayligh's wave theory

Radius of the Bother's orbit is r the radius of second orbit will be.

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2 r

3 r

4 r

8 r

The special theory of relativity was presented in 1905 by

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Young

Planck

Schrodinger

Einstein

A straight wire carrying current will experience a force when placed in a uniform magnetic field if

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The current and field are parallel

The current and field are at an angle

the current and field are parallel in opposite directions

All of the above

A frictionless heat engine can be 100% efficient only if its exhaust temperature is

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Equal to the input temperature

Less than the input temperature

0 ^oC

0 K

Base current of a transistor is 1 mA and collector current is 99 mA What is emitter current.

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1 mA

100 mA

98 mA

110 mA

A wave that consists of oscillations occurring perpendicular to the direction of energy transfer is called.

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Transvers wave

Longitudinal wave

Stationary wave

Shock wave

Which are different types of emission spectrum

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Continues spectrum

Line spectrum

Band spectrum

all of the above

Which animal did Erwin Schrodinger contemplate using in his famous thought experiment.

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mouse

Cat

Dog

Rabbit

The process of energy generation in sun and stars is.

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Fusion of heavy nuclei

fusion of light nuclei

Fission of light nuclei

Solar panels

Which of the following is an example of negative work.

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a thrown up cricket ball

Grass mower

A car on road

Bucket in the well

Echoes arise from

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Reflection

Refraction

Diffraction

Dispersion of sound waves

Absolute zero may be regarded as the temperature of which

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Water freezes

All substances are solids

All gases become liquids

Molecular motioning a gas would ceases

In alternating current circuits the quantity which plays the same role as resistance in direct current circuits is called.

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Reactance

Admittance

Conductance

Impedance

The equal and opposite forces acting on a body form

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Angular momentum

Linear momentum

Torque

Couple

An alternating current can be produced by

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Turbine

Electric motor

Generator

Trnasormer

When objects placed in a room are exposed to X- rays they appear

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Violet

Visible

Red

Invisible

Negative feedback

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Increases stability

Decreases stability

Produces oscillatory

Cannot occur

Which term is used for human eye deflect near sightedness.

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Myopia

Hypermetropia

Presbyopia

Calaract

The magnus effect is equivalent to

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Bernouli's theorem

Archimedes principle

Pascal's law

Blood pressure

The potential difference between two points is equal to the difference of

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Kinetic energy

potential energy

Electric current

Charge energy

When using the formula E = h lambda what unit should energy have.

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Joule

Watt second

Newton metre

Electron volt

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