Question # 1

The rate of change of momentum of a molecule is equal to:

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Pressure

Work

Density

Force

For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increases to

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Four times

Thrice

Once

Twice

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

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It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

Moment of inertia depends upon:

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Mass

Selection of axis of rotation

Both of them

None of these

The induced current is a conductor depends upon:

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both (A) and (B)

None of these

The temperature of gas is produced by

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At potential energy of its molecules

The kinetic energy of its molecules

The attractive force between its molecules

The repulsive force between its molecules

An object undergoes SHM. Its maximum equilibrium positions:

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Maximum

Half of its maximum value

Zero

None

According to the second law, which is must to produce work

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a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

When the body is at rest the relation

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W - T = ma

T - W = ma

T = W

None of these

The S.I. unit of stress is also

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Force

Pascal

Momentum

None of these

Inverse square law for luminace is valid for

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Search light

Isotropic point source

Cylindrical source

All types of source

You are traveling in a car during a thunder storm. In order to protect yourself from lightning you would prefer to

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Remain in car

Take shelter under tree

Get on and lie flat on the ground

Touch the nearest electric pole

The phenomenon is found to be prominent when size of the opening (aperture) is

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Grater than wavelength of light

Smaller than wavelength of light

Equal of light used

None of these

The perpendicular distance form the line of action of force to the pivot point is called

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couple arm

angular distance

moment arm

none of them

The Bernoulli's equation is based on the

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Law of conservation of energy

Law of conservation of mass

Law of conservation of momentum

None of these

Orbital velocity of an object mass m is proportional to

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m°

m²

m

m³

In an optical fibre the speed of light is

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Directly proportional to its refractive

Inversely proportional to its refractive inedex

Independent of refractive index

Directly proportional to square of refractive index

Which of the particles, electron, proton and neutron moving with same speed has longest wave length?

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Electron

Proton

Neutron

All have same

Who confirm the wave theory of light ?

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Newton

Michelson

Newton

Thomos Young

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