Question # 1

Mass of proton is of order of

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10^-31gm

10^-27kg

10^-24gm

10⁺²⁷kg

The space around the earth within it exerts a force of attraction on other bodies of known as:

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Nuclear field

Conservative field

Electric field

Gravitational field

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the:

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Force

Density

Work done

Pressure

Nucleon means:

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Only electrons

Only neutrons

Only protons

Both (A ) and (C)

Both (B) and (C)

An object undergoes SHM. Its maximum equilibrium positions:

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Maximum

Half of its maximum value

Zero

None

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

When a conductor moved with its length parallel to the lines of magnetic fled:

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An emf is induced across its ends

Emf induced is similar to that of a battery

Emf passes through the conductor

Both A and B

None of these

The rain drop falling from the sky reach the ground with

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Constant terminal velocity

Constant gravitational acceleration

Variable acceleration

acceleration greater than g

Satellites are held in orbits around Earth by its:

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Gravitational field

Magnetic field

Own orbital motion

Own spin motion

When temperature increase, the frequency of a tuning fork

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Increases

Decreases

Remains same

Increase or decreases depending on the material

In case of mechanical waves, we study the motion of

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a single particle

collection of particle

any one of them

none of them

If 'd' 'm' and fringe spacing ΔY are known, the interference effect due to light of λ

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Cannot be determine

Can be determined in same cases

Can be determined

None of these

Everything in the vastness of space is in a state of

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Rest

Motion

Perpetual motion

None of these

Velocity is a physical quantity which is

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Scalar quantity

Vector quantity

Variable quantity

None of these

The regular array of atoms in a crystal forms a natural diffraction grating of spacing typically

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≈ 10^-10 m

≈ 10^-12 m

≈ 10^-8 m

≈ 10^-9 m

The frame of reference in which Newton's first law of motion holds is known as

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Inertial frame of reference

Non-inertial frame of reference

Every frame of reference

None of these

A listener observes the frequency “f” of stationary source. If it move toward with 3 times of velocity of sound. Then the apparent frequency of the sound will be

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f

3f

f/2

4f

The polarized can be achieved by using process like

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Coherent sources

Diffraction

Selective absorption

None of these

The final image obtained by astronomical telescope is

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Inverted w.r.t object

Magnified

Virtual

All of them

As the working substance of a heat engine completes a cycle, there is no change in:

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Internal energy

Pressure

Volume

All of these

A piece of copper and another of germinium are cooled from room temperature to 80K. The resistance of

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Each of them increases

Each of them decreases

Copper increases and germanium for

Copper decreases and germanium increases

1 kg mass of a substance is equivalent to the mass of

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1.1 x 10³⁰ electrons

11 x 10¹⁹ electrons

1.6 x 10³¹ electrons

9.1 x 10¹⁹ electrons

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