Question # 1

The velocity given to a body to go out of the influence of earth's gravity is known as:

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Terminal velocity

Orbital velocity

Escape velocity

None of these

If the length of the conductor is double and its cross sectional area is halved, its conductance will

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Increase four fold

Become one-fourth

Become one-half

Remains unchanged

The work done in moving a body between two points in a conservative field is independent of the

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Direction

Force applied

Path followed by the body

Power

Which one of the following is the unit of electric field intensity

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JC^-1

Vm^-1

Cm^-1

CJ^-1

Distance covered by a freely failing body n the first second of its motion will be:

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4.9 m

9.8 m

19.6 m

29.4 m

According to Stoke's law, drag force depends on

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Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

The discuss used by athlete has a mass of 1 kg, its weight in newton is

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9.8 N

80 N

98 N

100 N

Which of the following material has longer half life

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radium

polonium

radium

uranium

Work is a scalar product of

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Force, Velocity

Velocity, Displacement

Force, Displacement

Force, Momentum

The S.I unit of frequency is

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Vibrations s^-2

Ms^-1

Hertz

s^-1

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

Crystalline solids have the properties such as

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Regular arrangement

Covalent bonding

Some what defective

All of them

Suppose the water flows out from a pipe at 3 kgs^-1and its velocity changes from 5 ms^-1to zero on striking the ball, then force is

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5.3 N

15 N

17.3 N

19.2 N

The motion of a body in a straight line is the motion in

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one dimension

two dimensions

three dimensions

four dimensions

When the magnitude of the drag force becomes equal to the weight then net force acting on the the droplet is

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Zero

Maximum

Remains the same

None of these

The SI units of momentum is

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Kg m s^-2

Kg ms

Kg m s²

Ns

The relation Cp > Cv by an amount equal to

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Gas constant

Universal gas constant

Both

None of these

The range of the diameter of core in multimode graded index fibre is

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50 to 100 μm

50 to 1000 μm

None of these

The magnetic fields are produced by the

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Moving charges

Bar magnets

Motion of conductor in a magnetic field

All of them

The vertical component of velocity of a projectile during its motion is minimum

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at the time of projection

at the highest point

just before hitting the plane of projection

all of them

As the droplet accelerates the net force acting on it is

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Increase

Decreases

Zero

None of these

If moon radius 1600 km and g on its surface is 1.6 ms^-2Then the escape velocity on the moon is

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1600 ms^-1

50.6 ms^-1

50.8 ms^-1

2263 ms^-1

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