Question # 1

In process of annihilation of matter, the two photons produced move in opposite direction to converse

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momentum

charge

energy

mass

The consumption of energy by a 1000 watt heter in half an hour is:

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5 Kwh

0.5 Kwh

2.5 Kwh

3.2 Kwh

1 amu is equal to

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

The wave form of S.H.M will be

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square wave

sine wave

rectified wave

saw-tooth wave

The basic circuit element in a d.c. circuit is a/an

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Inductor

Resistor

Capacitor

Battery

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

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Bright

Dark

Any of A and B

None of these

Wave nature of particle was proposed by

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Einstein

Plank

De-Brogile

Max well

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

Particles have the mass smallest of following is:

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Electron

Proton

Neutron

Quark

Astrophysics is a branch of physics, which deals with

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Sub-atomic

Stars and galaxies

Light and sound

Music

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

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Spherical

Cylindrical

Plane

None of these

the ratio of mean K.E of chlorine and oxygen molecules at same temperature is

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16 35.5

35.5 16

(35.2)²16

1 1

In Newton's rings the thickness of air film at the point of contact is

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maximum

minimum

equal to wavelength

zero

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

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tiny regions

domains

vectors

none of them

Work is defined as the dot product force and displacement which is a

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Scalar quantity

Vector quantity

Constant quantity

None of these

The rate of change of angular velocity is called

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Angular displacement

Angular acceleration

Instantaneous velocity

None of these

What will be the ratio of the distance moved by a freely falling body from rest in 4^th and 5^th seconds of journey?

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4 : 5

7 : 9

16 : 25

1 : 1

If the slits in YDS experiment are made closer, fringe spacing will:

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Increase

Decrease

Remain same

None of above

Propagation of light in an optical fibre requires that the light should

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be partially confined within the fibre

be totally confined within the fibre

not be confined within the table

none of them

Stress may be

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Tensile

Compressive

Shear

All of these

Which of the following has no dimension

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Stress

Strain

Elastic modulus

Both strain and elastic modulus

A person is standing on a rotating stool spreading his arms.He suddenly contracts his arms.His

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Angular momentum increases

Momentum of inertia increases

Momentum of inertia decreases

Angular momentum decreases

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