Question # 1

Huygen's wave theory of light cannot explain

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Diffraction

Interference

Polarization

Photoelectric effect

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

The conductivity of a superconductor is

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Infinite

Very large

Very small

Zero

An ideal choked (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

Which quantity is increased in step-down transformer?

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Current

Voltage

Power

Frequency

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

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Increas

Decreases

Remain the same

First A then B

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

If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting. Calculate the focal length of objective

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100 cm

10 cm

20 cm

25 cm

The henry is the unit for

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Resistance

Magnetic flux

Magnetic field

Inductance

The smooth or steady stream-line flow is know as

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Laminar flow

Turbulent flow

Both a and b

None of the above

The direction of induced current is such that it opposes the very cause that has produced it. This is the law of

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Lenz

Faraday

Kirchoff

Fleming

A 2 kg body and a 3 kg body have equal momentum. If the kinetic energy of 3 kg body is 10 J, the KE of 2 kg body will be

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6.66 J

15 J

22.5 J

45 J

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is:

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Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

In which of the following states does the incandescent substance give continuous spectrum?

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Vapours in atomic state

Vapours in molecular state

Solid or fluid in bulk state

Solid or fluid in plasma state

A couple produces

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Purely linear motion

Purely rotational motion

Linear and rotational motion

No motion

When n-type of semiconductor is heated

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Number of electrons increases while that of holes decreases

Number of holes increases while that of electron decreases

Number of electrons and holes remains same

Number of electrons and holes increases equally

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NAT II Physical Science Physics MCQs With Answers

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