Question # 1

The direction of the linear momentum is the direction of

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speed

velocity

weight

none of them

Some charge is being given to a conductor. Then its potential

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Is maximum at surface

Is maximum at centre

Is remain same throughout the conductor

Is maximum somewhere between surface and centre

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

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Increase the mass of water flowing per second

Avoid wastage of water

Increase the velocity of water flowing out

Increase the volume of water flowing per second

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s²)

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9.8 m/s

19.6 m/s

39.2 m/s

98.0 m/s

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

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Positive

Negative

Zero

None of these

During the upward motion of the projectile, the vertical component of velocity:

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Decreases

Increases

Remains constant

None of these

Magnetic effect at a point caused due to flow a current depend upon the

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Quantity of current

Distance from current

Both the quantity of current and distance from current element

None of the all

When a person jumps off the ground, the reaction force of the ground is

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greater than the weight of the person

smaller than the weight of the person

equal to the weight of the person

zero

The conventional current is the name given to current due to flow of

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Positrons

Positive charges

Negative charges

Both A and C

None of these

Practically the quantity v/c is always:

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less than one

Equal to one

Greater then one

all of these

None of these

A solar cell is made from:

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Iron

Silicon

Germanium

Copper

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

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heat capacity

specific heat capacity

specific heat at constant volume

specific heat at constant pressure

The vertical and horizontal range will be equal id angle of projection is

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76°

45°

60°

120°

The short distance between two points direction from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

The quantity having the same unit as that of emf is:

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Force

Energy

Potential

Current

Charge

The wave nature of light was proposed by:

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Newton

Thomas Young

Huygen

None of these

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60km/h. His average speed will be

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40 km/h

48 km/h

50 km/h

60 km/h

Bodies which falls freely under gravity provides good example of motion under:

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Uniform acceleration

Non-uniform acceleration

Uniform velocity

None of these

Sound waves in air always

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Longitudinal

Transverse

Stationary

Electromagnetic

Which of the following can become a good temporarily magnet

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iron

steel

both of them

none of them

During the nuclear changes, the law/s of conservation that hold/s are that of:

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Charge

energy

Momentum

Mass

All of these

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

Electric field strength is defined as

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Work done on unit charge

Force exerted on unit charge

Distance covered by unit charge

Power exerted by unit charge

None of these

Particles have the mass smallest of following is:

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Electron

Proton

Neutron

Quark

The instrument used to gather information form the far side of the universe is

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Compound microscope

Radio telescope

Astronomical Telescope

Simple microscope

Static electricity is produced by the transfer of:

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Electrons

Protons

One fluid

Two fluid

None of these

The critical temperature of aluminium is

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1.18 K

4.2 K

3.72 K

7.2 K

The intensity at a point due to a charge is inversely proportional to

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Amount of charge

Size of the charge

Distance between charge and the point

Square of the distance from the charge

None of these

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

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The upper half of the image is cut off

The brightness of the image is reduced

The brightness of the image is increased

No effect at all

The rate of decay of radioactive substance

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is constant

decrease exponentially with time

varies inversely as time

decreases linearly with time

A force of 5 n is acting Y-axis. Its component along X-axis is:

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7 N

5 N

Zero

10 N

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