Question # 1

Radiation detector are used to

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measure intensity of radiation

measure energy of radiation

difference between different types of radiation

all the above

Physical quantities are often divided into ______ categories

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3

2

9

5

The transition from solid to liquid is actually from:

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Order to disorder

Disorder to order

Order to order

Disorder to disorder

None of these

When a platinum wire is heated, it appears yellow at

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1600°C

900°C

1100°C

1300°C

The graph showing the variation of displacement with time is a

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Sine curve

Straight line

Parabola

None of these

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

At high altitude the blood oozes out of the nose and ear because

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The blood pressure increase at high altitudes

The percentage of oxygen in the air increase

The atmospheric pressure decrease there

The density of blood decrease at high altitudes

If the acceleration of a body is not uniform, then velocity-time graph will be:

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Curve

Straight line

Sphere

All of these

The nature of thermal radiation is similar to:

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Ultraviolet rays

Light rays

Both of them

None of these

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

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V/e

eV

e/V

V

Curie is a unit of

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reluctance

resistivity

binding energy

radioactivity

The velocity of a body at some particular instant is called

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Initial velocity

Instantaneous velocity

Variable velocity

None of these

The unit of permittivity of free space ε_° is:

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Newton-metre²/coulomb

Coulomb/Newtonxmetre

Coulomb²/(Newtonxmetre)²

According to Huygen's principle, the new position of the wavefront after a time can be found by constructing a surface that touches all the

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primary wavelets

secondary wavelets

either of them

none of them

The irregular flown of fluid is called

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Normal flow

Streamline flow

Turbulent flow

None of these

A magnetic field

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Always exerts a force on a charged particle

Never exerts a force on a charged particle

Exerts a force on a charged particle if it is moving across the magnetic lines of force

Exerts a force on a charged particle if it is moving along the magnetic lines of force.

A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shortest path in 15 minutes.The velocity of the river in km/s is:

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1

3

4

√41

Relativistic mechanics was developed by

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Davison and Germer

Heisenberg

Max. Planck

Albert Einstein

A null vector is defined as

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Zero magnitude

Arbitrary direction

Fixed direction

a and b

Newton's laws are empirical laws, deduced from

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Theories

Experiments

Facts

None of these

If the volume of a gas is to be increased four times then

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Its temperature must be doubled

At constant temperature its pressure must be decreased four times

At constant temperature its pressure must be increased two times

It cannot be increased

Bulk modulus for bass is

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20

41

61

81

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