Question # 1

The SI unit of absorbed dose in.

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Bel

Weber

Rem

Grey

Which of the following is an example band spectra.

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Black body radiation spectrum

Atomic spectra

Molecular spectra

Anomalous spectrum

The absorption of X-rays in a given material follows.

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A parabola path

Is straight line

An exponential curve

A circle

On which of the following the kinetic theory of gases is not applicable.

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Water vapour

Smoke particles

Bound particles

Free electrons

A preset or trimmer can be a.

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Variable resistor

Variable capacitor

Variable inductor

All of these

Sound of frequencies lower than 20 Hz are called.

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Supersonics

Infra sonics

Ultrasonic

Audible sound waves

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

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any scalar quantity

Any negative number

Its magnitude but not direction

Its magnitude and direction

As the mass number varies, which of the quantities does not change w.r.t nucleus.

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Mass

Volume

Binding energy

Density

Which of the following properties of light does not very with the nature of the medium.

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Amplitude

Frequency

Wavelength

Time period

If pressure and temperature of an ideal gas is doubled and volume is halved, the number of the gas molecules.

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Become half

Remain constant

Become double

Become three times

When a monochromatic wave enters from one medium into another the property that remains unchanged.

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Amplitude

Velocity

Frequency

Nature of the wave

A force of 10 N is acting along z-axis, its component along x -axis and y-axis is

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2 N , 8 N

3 N, 7 N

5 N each

Zero

Who measured the intensity of emitted energy with wavelength radiated from a blackbody at different temperature.

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Lummer

Pringsheim

stefan

Both a and c

A wave that consists of oscillations occurring perpendicular to the direction of energy transfer is called.

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Transvers wave

Longitudinal wave

Stationary wave

Shock wave

Negative feedback

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Increases stability

Decreases stability

Produces oscillatory

Cannot occur

A well known example of an intrinsic semi conductors is.

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Germanium

Phosphorus

Cobalt

Aluminium

Which of the following is a set of supplementary units.

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Radian and steradian

Radian and mole

Steradian and candela

Radian and kelvin

Which of the following is a properly of a uniform gravitational field.

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If acts equally in all directions.

Its field strength is the same at all points with in it

the gravitational potential has the same value of all points with in it

It produces zero force on a stationary test mass placed in it.

A body is termed as perfectly elastic if.

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It can move freely

Its surface is perfectly somooth

It is not affected by an external force

It recovers the original shape when the deforming force is remover

When net torque acting on a system is zero which of the following will be constant.

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Force

Angular momentum

Linear momentum

Linear impulse

The sensitivity of the galvanometer can be increased by increasing the

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Number of turns of the coil

Area of the coil

Strength of the magnetic field

All of the above

A semiconductor diode conducts only when it is

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Not biased

Zero biased

Reverse biased

Forward and biased

Kinetic and potential energies are

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Not inter convertible

Inter convertible

Two forms of torque

Not related with each other

Power of the lens is one dioptre, if its focal length is.

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1/6 metre

1/2 metre

1 metre

8 metre

A charge kept at the centre of a shell The shell has charge Q and radius R The force on the central charge due to shell is

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in the upward direction

Towards left

Towards right

Zero

The maximum number of rays required by a lens to form an image are

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2

3

4

Infinite

Internal energy of a gas decreased when

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It gains heat

Change in cycle

Change in adiatatic

Change in reversible

Which of the following wavelength lies in X-rays region.

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1 A

100 A

1,000 A

10,000 A

The dimension of momentum is.

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[MLT-1]

[ML2T-2]

[ML3T-2]

[MLT-1]

An AND gate is.

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Equivalent to a series switching circuit.

Equivalent to a parallel switching circuit

Equivalent ot universal gate

A reciprocal of NAND gate

What happens to internal energy of a piece of lead when hammered.

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Increases

Decreases

Remains unchanged

Becomes zero

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