Question # 1

Which of the following material has smaller has life

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uranium

polonium

radium

radian

Melting point of ice

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Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

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

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

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1840 KeV

1/1840 KeV

1 KeV

920 KeV

In gases, the charge carriers are:

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Electrons

Positive ions

Negative ions

Both A and C

Both A and B

In Bernoulli's theorem the relation between velocity and pressure is

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Inverse

Direct

None of the above

Both a and b

Tick the conservation force:

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Tension in a string

Air resistance string

Elastic spring force

Frictional force

The wave motion set up in any medium depends upon:

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Elasticity

Inertia

Density

All of these

The body passing a viscous medium affected by:

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One force only

Two forces only

Four forces

None of these

The open loop gain of OP-AMP is of the order of

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10²

10³

10⁴

10⁵

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

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1 : 2

4 : 1

1 : 4

2 : 1

Negative and positive charge in a hollow sphere are equal in the number then flux from the surface will be

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Zero

Positive

Negative

Flux will be both negative and positive

Ordinary light has components of vibration in

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One direction

Different direction

All directions

None of these

A negative sign is assigned to quantities where direction is opposite to that of

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final velocity

initial velocity

instantaneous velocity

all of them

The binding energy per nucleon is:

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Greater for heavy nuclei

Least for heavy nuclei

Greatest for light nuclei

Greatest for medium nuclei

For a gas obeying Boyle's law, if the pressure is doubled the volume becomes:

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One half

Double

Four times

None of these

While applying Guass's Law assuming that the field is

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In different directions

Constant in direction

In all directions

None of these

A circular scale is attached and graduated in

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One degree

2 degrees

Half degree

None of these

In rotational motion, the analogue of force is

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Rotational inertia

Moment of inertia

Torque

Mass

The substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

Such substance which break soon after crossing the elastic limit is called

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Weak substance

Ductile substance

Brittle substance

Organic substance

Fire fighters have a jet attached to the head of their water pipes in order to

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Increase the mass flow per sec

Increase the volume flow per sec

Increase the velocity of water flowing out

Avoid wastage of water

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