Question # 1

The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is

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very high

very low

constant

zero

Conversion of chemical energy to electrical energy can be achieved by:

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Primary cell

Secondary cell

Both (A) and (B)

Photovoltaic cell

Solar cell

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called

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tiny regions

domains

vectors

none of them

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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First

Second

Third

None of these

Biomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

If water in a closed bottle is taken up to the moon and opened, the water gets

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Freeze

Boiled

Dissociated into O₂and H₂

Evaporated

The velocity of sound is greatest in

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Water

Air

Vacuum

Metal

A device which converts Electrical energy into mechanical energy is called as

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Transformer

Generator

Motor

All of these

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

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Much more

Very small

No amount at all

None of these

Which quantity has the same dimension as that of impulse?

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KE

Power

Momentum

Work

The value of relative permittivity of different dielectrics are:

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Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

How many isotopes of helium are present?

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1

2

3

4

Such an inductor coil which does not consume energy and is often employed for controlling a.c. without consumption of energy is called

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Choke

impedance

Semi-conductor

None

Velocity of particle executing SHM will be maximum at

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Extreme position

Mean position

b/w mean and extreme

None

A long wire wound tightly on a cylindrical core is called:

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Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

The capacity of a parallel plat capacitor depends on the

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Type to metal used

Thickness of plates

Potential applied across the plates

Separation between the plates

The current sensitivity of the galvanometer is

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C/BAN

BAN/C

CAN/B

CBN/A

If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be

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turbulent

streamline

abrupt

none of them

The SI unit of spring constant is identical with that of

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Force

Surface tension

Pressure

Loudness

When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is

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zero

negative

positive

non-existing

Essential characteristic of equilibrium is

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Momentum equal to zero

Acceleration equal to zero

Kinetic energy equal to zero

Velocity equal to zero

The unit of decay constant is:

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Second

Metre

Hour

Year

Second^-1

The electrons occupying the conduction band are known as

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conduction electrons

free electrons

both of them

none of them

The work done by a force keeping an object in circular motion with constant speed is:

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Zero J.

0.1 J

1 J

0.01 J

The internal energy of an ideal gas system is generally the

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translational K.E of molecules

vibrational K.E of molecules

rotational K.E of molecules

all of them

The system international (SI) is built from _______ kind of unites

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Two

Three

Four

Five

The concept of field theory was put forward by

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Franklin

Kepler

Oersted

Michael Faraday

A particle executes SHM with frequency. The frequency with which its K.E oscillates is

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f/2

2f

f

4f

γ-rays behave like a particle because they explain the

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Compton effect

Photoelectric effect

Pair-production

all the above

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