Question # 1

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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1/3 V

2/3 V

3/2 V

3V

Monochromatic light means waves of:

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Same frequency

Same colour

Same wavelength

All of them

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

A particle is moving along a circular path with uniform speed. Its projection will execute ___along the _____ of the circle:

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Circular motion, circumference

Vibratory, chord

SHM, diameter

SHM, circumference

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

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R

R²

1/R

(1/R)²

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

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Fringe width will decrease

Fringe width will increase

Fringe width will remain unchanged

Fringe will become less intense

The time period of a simple pendulum is independent of its:

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Length

Mass

Value of g

Both A and B

In the compton's effect, it is found that the wavelength of incident x-rays is

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greater than the wavelength of scattered x-rays

equal to the wavelength of scattered x-rays

less than the wavelength of scattered x-rays

any one of these

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

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Greater than

Smaller than

Equal to

None of these

Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is

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45°

60°

50°

40°

Centripetal acceleration is also called ______ acceleration

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Tangential

Radial

Angular

None of them

1 torr is expressed as

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136.5 Nm^-2

13.3 Nm^-2

133.3 Nm^-2

130.5 Nm^-2

A charge -4 μ C is at origin and +16 μ C is at a distance 3 m on positive x-axis the zero field is located at

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3 m along y=axis

3 m along negative x-axis

3 m along positive x-axis

6 m along negative x-axis

The kinetic energy of a body of mass 2 kg and momentum of 2 Ns is

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1 J

2 J

3 J

4 J

The unit of intensity of electric field is

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newton/coluomb

Joule/culomb

Volt x metre

Newton/meter

Of the following quantities, the one that is vector in character is an electric

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Charge

Field

Energy

Potential Difference

A new type of optical fibre in which central core has high refractive index and its density gradually decreases towards its periphery is called

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Step index fibre

Multimode step index fibre

Multimode graded index

None of these

The blending of light when it passes from one medium to another is known as:

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Refraction

Interfarance

Polarization

Both (B) and (C)

Action and reaction forces always act on the

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same bodies

different bodies

either of them

neither of them

We are living in the age of

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Technology

Information technology

Space age

None of these

The unit cell of the shape of match box is called

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Cubic

Tetragonal

Orthorhombic

Rhomboheral

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

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