Question # 1

The average power dissipation in a pure capacitor in AC circuit is

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1/2 CV²

CV²

2CV²

Zero

Which of the following is equal to:

joule x ohm / volt x second ?

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Ampere

Volt

Watt

Tesla

The structure of solids is investigated by using

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Cosmic Rays

X-rays

Intra red Radiation

y-rays

The time period of a simple pendulum is 2 seconds if its length is increased by 4 times then its period becomes

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16 s

12 s

8 s

4 s

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude then their magnitude are:

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3, 15

4, 14

5, 13

6, 12

When sound waves travel from air to water which of these remains constant?

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Velocity

Frequency

Wavelength

All the above

If the amplitude of sound is doubled and the frequency reduced to one-fourth the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

A couple produces

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Purely linear motion

Purely rotational motion

Linear and rotational motion

No motion

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

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R

R²

1/R

(1/R)²

The dimensional formula for the modulus of elasticity is same as that for.

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Stress

Strain

Velocity

Surface tension

The mass defect for the nucleus of helium is 0.0303 a.m.u What is the binding energy per nucleon for helium in MeV?

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28

7

4

1

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