Question # 1

Two point charge +3μC and +8μC repel each other with a force of 40 N. if a charge of -5μC is added to each of them then the force between will become

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-10N

+10N

+20N

-20N

Velocity of sound in a diatomic as is 300 m/sec what is its rms velocity

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400 m/sec

40 m/sec

430 m/sec

300 m/sec

In a voltmeter the conduction takes place due to

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Electrons only

Holes only

Electrons and holes

Electrons and ions

The peak voltage in a 200 volt A.C supply is nearly

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220

253

311

Ball pen function on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tension

Mechanical waves on the surface of a liquid are

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Transverse

Longitudinal

Torsional

Both transverse and longitudinal

A force of 10N is acting along y-axis its component along x-axis is

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10N

20N

100N

Zero N

The frequency of the incident light falling on a photosensitive metal plate is doubled the kinetic energy of the emitted photoelectrons is

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Double the earlier value

Unchanged

More than doubled

Less than doubled

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

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