Question # 1

One coulomb of charge is created by

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10 electrons

1.6 x 10^-19electrons

6.25 x 10¹⁸electrons

6.25 x 10²¹electrons

Acceleration of a body is positive, if the velocity of the body is

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constant

increasing

decreasing

none of them

U-238 present in the natural uranium is about:

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59%

0.007%

99%

39%

19%

The CRO deflects the beam of electrons, when they passes through uniform

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electric field

gravitational field

magnetic flax

magnetic field

In the force applied to parallel to the direction of motion, then the work done is:

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Positive

Negative

Zero

None of these

A field in which the work done in moving a body along closed path is zero is called

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Nuclear Field

Conservative field

Gravitational field

Non-conservative field

The units of modulus of elasticity are

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Nm^-2

Nm

ms^-1

Pascal

The emission of radiations take place in elements, having charge number greater than

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109

82

69

52

Balmer series was identified in:

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1685

1785

1885

1985

1585

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

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

A prism splits a beam of white light into its seven constituent colors.This is so because

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Phase of different colors is diferent

Amplitude of different colors is different

Energy of different colors is different

Velocity of different colors if different

Young's modulus for mercury is

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0

2

5

6

Light waves are:

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Mechanical waves

Electromagnetic waves

All of above

None of above

The relative permitivity for vacuum is

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1

2

1.002

1.004

The SI unit of stress is some as that of:

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Pressure

Momentum

Impulse

Change momentum

Force

The example of insulators are

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Copper

Nickel

Diamond

None of these

Which of the Following bulb will glow Brightest?

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100W

200W

300W

400W

Which quantity has the same units as impulse?

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force

work

linear momentum

acceleration

One angshom is equal to?

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10^-8cm

10^-6m

10^-10nm

10^-8nm

When the torque acting on a system is zero, which of the following will be constant

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linear momentum

angular momentum

impulse

force

Einsteins theory say that gravity

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Follows inverse square law

Donot follow the inverse square law

Very weakly follow inverse square law

None of these

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