Question # 1

Charge on neutron is

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1.6 x 10^-19C

zero

-1.6 x 10^-19C

1.2 x 10^-19C

γ-rays behave like a particle because they explain the

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Compton effect

Photoelectric effect

Pair-production

all the above

The wave nature of light was proposed by:

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Newton

Thomas Young

Huygen

None of these

Electric lines of force

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Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

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2.0 x 10^-5/°C

4.0x10^-5/°C

6.0x10^-5/°C

2.33x10^-5/°C

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

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

Heat travels through vacuum by

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Conduction

Convection

Radiation

Both A and B

An ideal choke (used along with fluorescent tube) would be

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A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

When quarter of a cycle is completed, the phase of vibration is:

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90°

180°

45°

360°

The resistance of a conductor does not depend on its

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mass

resistivity

length

cross-sectional area

Huygen's theory cannot explain:

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Diffraction

Interference

Polarization

Photoelectric effect

Two bodies A and B each of mass 2 kg moving towards right collide with each other elastically,after collision

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A stops and velocity of B increases

Velocity of both decreases

Both moves with the same velocity

Both interchange their velocities

The dielectric constant K of an insulator cannot be.

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3

8

6

∞

The process of doping causes resistivity of semiconductor to

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Increase

Decrease

Same

Become zero

Bernoulli s equation is the fundamental equation in fluid dynamics that relates pressure to

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Height of fluid column

Fluid speed

Both of these

None of these

For constructive interference path difference should be

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Integral multiple of λ/2

Integral multiple of λ

Odd integral multiple of λ

Odd integral multiple of λ/2

The ability of anybody to return, to its original shape is called

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Elasticity

Elastic force

Stress

Strain

Find the average speed of oxygen molecule in the air at S.T.P

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591 ms^-1

461 ms^-1

396 ms^-1

372 ms^-1

Angular momentum has the same unit as

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Impulse x distance

Linear momentum x time

Work x frequency

Power x time

The certain physical properties of a material are used to construct a temperature scale which varies with temperature

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Linearly

Inversely

Remains constant

None of these

The stopping potential for a certain metal is 10 volt, the max. Energy of emitted electron is:

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10 J

100 J

1.6 × 10-18 J

1.6 × 10-19 J

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