Question # 1

The modulus of rigidity of a liquid is

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Zero

1

Infinity

A value not one of those mentioned above

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

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1/2 CV²

CV²

2CV²

Zero

The number of translation degrees of freedom for a diatomic gas is

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2

3

5

6

The structure of solids is investigated by using

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Cosmic Rays

X-rays

Intra red Radiation

y-rays

What remains constant when the earth revolves around the sun?

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Angular momentum

Linear momentum

Angular kinetic energy

Linear kinetic energy

Who explained the origin of the Fraunhofer lines?

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Fraunhoffer

Kirchhoff

Fresnel

Snell

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 nucleus 6C12 absorbs an energetic neutron and emits a beta particle (β) The resulting nucleus is

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₇N¹⁴

₅B¹³

₇N¹³

₆N¹³

What is the average energy of N molecules of monoatomic gas?

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1/2 NkT

NkT

3/2 NkT

5/2 NkT

In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie

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Ultraviolet

Infra red

Visible

X-ray

One cannot see through fog because

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Fog absorbs light

The refractive index of fog is infinity

Light suffers total reflection at the droplet in a fog

Light is scattered by the droplets in fog

If in a moving coil galvanometer a current 1 produces a deflection θ then

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i ∞ tan θ

i ∞ θ²

i ∞ θ

i ∞ √θ

A point charge Q is placed at the mid-point of a line joining two charges 4q and q. if the net force on charge q is zero. then Q must be equal to

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-q

+q

-2q

+4q

Which of the following is equal to:

joule x ohm / volt x second ?

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Ampere

Volt

Watt

Tesla

Steel is preferred for making springs over copper.Whey?

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Steel is cheaper

Young's modulus of steel is more than that of copper

Young's modulus of copper is more than that of steel

Steel is less likely to be oxidized

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