Question # 1

The range ofβ-particle in air is greater than that ofα-particle by

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1000 times

100 times

15 times

10 times

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

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0.5 J

2 J

0.25 J

1 J

The earth's potential is taken as

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Negative

Positive

Zero

Infinite

The Space around the Earth within which it exerts a force of attraction on other bodies is known as

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Nuclear field

Conservative field

Electric field

Gravitational field

A piece of wire along which charges are made to accelerate is known as

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transmitting antenna

receiving antenna

modulator

nor of these

If the distance between two charges is doubled, the force between them will become

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Double

Half

Three times

One fourth

One third

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

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decreases

first increases then decreases

increases

any one of them

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

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22/7

7

14

21

Suppose the water flows out from a pipe at 3kg s^-1and its velocity changes from 5m s^-1to zero on striking the wall, then the force exerted by water on wall will be

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5 N

10 N

15 N

20 N

In the theory of dimensional analysis, heat may be properly represented by:

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ML²T^-2

MT^-2

ML^-1T^-1

None of these

The chemical properties of an element depends upon the number of

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electron

position

photons

neutrons

The unit of power is

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Erg

KW

Watt

both B and C

Approximate power of colour T.V. in watt is

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90

100

130

120

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12.If the resultant is at 90° with the force of the smaller magnitude then their magnitudes are:

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3, 15

4, 14

5, 13

6, 12

Most motorbikes have ____________ cylinder/s engine but cars usually have _________ cylinders on the same crankshaft.

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Four , Six

One , four

two , five

None of these

The bright fringes are termed as

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minimum

maximum

bright spots

dark spots

Michelson interferometer is based upon

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Interference

Diffraction

Polarization

Reflection

The strain is the ratio of

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Stress/strain

Strain/stress

Force area

change in length/original length

The ballistic missiles are useful for

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Short ranges

Long ranges

Medium ranges

None of these

An electron and a proton are projected at right angles to a uniform magnetic field with

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the electron trajectory will be less curved than proton’s trajectory

the electron trajectory will be more curved than proton’s trajectory

) both trajectories will be equally curved

) both particles continue to move along a straight lins

Temperature remain constant the volume of given mass of a gas is inversely proportional to the pressure applied on it. it is called

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General gas law

Boyle's law

Charles law

None of these

The examples of diamagnetic substances

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Water

Copper

Antimony

All of them

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