Question # 1

Light waves are:

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Transverse wave

Longitudinal wave

Compressional wave

None of them

Relativistic mechanics is a branch of physics, which deal with the bodies moving with velocities:

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More then c

Approaching c

Equal to c

Much less than x

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

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Smaller

Lerger

Same

Much larger

None of these

The internal energy of a system does not depend upon the

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initial state of the system

final state of the system

path

none of them

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

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2V

3V

0.5V

V

Charge to mass ratio (e/m) of an electron is given by the relation

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e/m = 2V/Br²

e/m = 2V/B²r

e/m = 2V/B²r²

e/m = V/2B²r²

The number of input terminals of an op-amp is:

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One

Two

Three

Four

None of these

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

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Greater than

Less than

Equal to

None of these

Truth of kinetic energy is confirmed by:

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Diffusion of gases

Brownian motion

Both A and B

None of these

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

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Velocity

Displacement

Speed

Distance

The spacing between the parallel lines are served as

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slits

source of light

opaque lines

fringes

In a container having water filled up to a height h,a hole is made in the bottom.The velocity of water flowing out of the hole is

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Independent of h

Proportional to h^1/2

Proportional to h

Proportional h²

When crest of one wave falls on the crest of the other wave. This phenomenon is known as:

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Destructive interference

Diffraction

Polarization

Constructive interference

Can you add zero to a null vector ?

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No

Yes

Yes in some cases

None of these

In Young's double slit experiment, the fringe width depends on

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wavelength of the light used

distance between the slits and screen

distance between the slits

all of them

The initial velocity of a body moving along a straight line in 7 m/s.It has a uniform acceleration of 4 m/s².The distance covered by the body in the 5th second of its motion is

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25 m

35 m

50 m

85 m

Polymers have chemically combinations with

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Carbon

Nitrogen

Hydrogen

All of them

A spectrometer is an optical device used to study the spectra from different sources of light which is

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Absorption spectra

Emission spectra

Discrete spectra

None of these

If we increase the distance between two plates of the capacitor the capacitance will

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Increase

Decrease

Remain same

First increase then decrease

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 total linear momentum of an isolated system remains

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Constant

Variable

Zero

None of these

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