Question # 1

Density is defined as:

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Mass per volume

Volume per mass

Mass x volume

Mass per length

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

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Coulomb's law

Gauss's law

Biot-Sarwat law

Ampere's law

The branch of physics which deals with the properties of fundamental particles is called:

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High energy physics

Molecular physics

Astrophysics

Space physics

The magnitude of alternative voltage V:

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Always increase

Always decrease

Remains constant

Does not remain constant

None of these

The number of vibration in two seconds can be expressed as

______ of frequency of vibration is f:

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f

2 f

3 f

1/2 f

Direction of motion _________ in circular motion

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Changes off and on

Changes continously

Does not change

None of them

The area under line velocity-time graph is numerically equal to the

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speed of the body

acceleration of the body

distance covered by the body

none of them

The current is measured in

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volts

watt

ampere

ohm

In an interference pattern of Young's double slit(YDS) experiment:

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Bright fringesare wider than dark fringes

Dark fringes are wider than bright fringes

Both dark and bright fringes are of equal width

Central fringes are wider than the outer fringes

One mole of any substance contain

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same number of molecules

different number of molecules

may be same or different

none of them

The work performed on an object does not depend on:

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Force applied

Angle at which force is inclined to the displacement

Initial velocity of the object

Displacement

If a lens is cut into two piece perpendicular to the principal axis and only part is used the intensity of the image:

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Remains same

1/2 times

2 times

Infinite

Angle between ray of light and the corresponding wavefront is:

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0°

60°

90°

120°

Who gave the idea of light as wave ?

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Newton

Huygen

Thomos Young

Bragg

The diode charactristics curve is plot between

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I & t

V& t

V& I

None

The limit below which the Hooke s law holds well is called

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Yield point

Breaking stress

Tensile strength

Elastic limit

A process in which no heat enters or leaves the system is called.

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Adiabatic process

Isothermal process

Isochoric process

None of these

Reflection of light from water, glass, snow and rough road surfaces, for larger angle of incidences, produces

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images

bright images

interference

glare

The critical temperature of mercury is

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1.18 K

4.2 K

3.72 K

7.2 K

If one of the rectangular components of a vector is not zero, can its magnitude be zero

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It is zero

It if not zero

It may be negative

None of these

Propagation of light in an optical fibre requires that the light should

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be partially confined within the fibre

be totally confined within the fibre

not be confined within the table

none of them

The pressure exerted on the walls on the vessel by gas molecules is defined as:

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Force per unit volume

Energy per unit area

mass per unit volume

None of these

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