Question # 1

In case of an ideal gas, the P.E associated with its molecule is

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maximum

zero

minimum

not fixed

If we increase the length of a simple pendulum four times, its time period will become

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2 times

3 times

4 times

6 times

The concept of electric field theory was introduced by

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Michael Faraday

Newton

Dalton

Kepler

Einstein

In L.C.R series A.C. circuit, the phase angle between current and voltage is

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Any angle between 0 and +π/2

π/2

π

Any angle between 0 andπ/2

A digital system deals with quantities which has discrete values:

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Two in number

One in number

Three in number

Four in number

None of these

The magnitude of resultant of three vectors is 3. Its x-component is one, y-component is two, then its z-component is:

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0

1

2

3

If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then

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C_p- C_v= R

C_p- C_{v < R}

C_p- C_{v = 0}

C_p- C_{v > R}

The rate of decay of a radioactive substance

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decrease exponentially with time

decreases linearly with time

increases linearly with time

increases exponentially with time

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

The magnitude of induced emf depends upon the:

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Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

Photo cells is a device which convert light into:

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Wave nature

Particle nature

Particle wave nature

Dual nature

If the particle is moving in a circle of radius 'r' with uniform angular velocity ω. The angle between r and tangential velocity is

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0^o

90^o

180^o

270^o

In Michelsion's interoferometer, if the moveable mirror is moved through a distance 0.05 mm and 500 finges are observed, then the wavelength of light used is

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1 x 10^-7m

2 x 10^-7m

1.5 x 10^-7m

1 x 10^-8m

The drag force increase if the speed of the object moving through a fluid

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Increases

Decreases

remains constant

None of these

According to WH Bragg and WL Bragg monochromatic beam of X-rays was reflected form a crystal plane is like a

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Smooth and regular

Mirror

Thin film

None of these

A body moving in a circular path with constant speed has

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Constant acceleration

Constant retardation

Variable acceleration

Variable speed and constant velocity

In Michelson's interferometer , the plates are placed in front of incident ray at an angle of:

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45^o

60^o

90^o

120^o

A test charge q is the charge which is

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Very small

Very strong

A point charge

All of them

For the monochromatic beam of X-rays, the crystal planes in a lattice act like a

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perfect absorbers

boundary

mirror

none of them

A null vector is defined as zero magnitude and its direction is

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Specific

Arbitary

Undefined

None of these

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

not completely filled and play active part in conduction process

not completely filled and play no part in conduction process

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