Question # 1

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19 C. The number of excess electrons on the drop is

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3.9

4

4.2

6

In which case application of angular velocity is useful?

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When a body is rotating

When velocity of body is in a straight line

When velocity is in a straight line

None of these

The temperature at which the speed of sound becomes double as was at 27°C is

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273°C

0°C

927°C

1027°C

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in he form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

If the dot product of two non-zero vectors vanishes the vectors will be

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In the same direction

Opposite to each other

Perpendicular to each other

Zero

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

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

The conductivity of a superconductor is

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Infinite

Very large

Very small

Zero

With the propagation of a longitudinal wave through a material medium the quantities transmitted in the propagation direction are

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Energy momentum and mass

Energy

Energy and mass

Energy and linear momentum

A capacitor acts as an infinite resistance for

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AC

DC

Both AC and DC

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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