Question # 1

A p-n junction has a thickness of the order of

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1 cm

1 mm

10^-6 cm

10^-12 cm

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

The sieman is the SI unit of

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Resistance

Specific Resistance

Conductance

Inductance

The twinkling of stars is due to

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The fact that stars do not emit light continuously

The refractive index of the earth's atmosphere fluctuate

Intermittent absorption of star light by its own atmosphere

None of them

Energy is stored in the choke coil in the form of

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Heat

Magnetic energy

Electric energy

Electro -magnetic energy

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

The de broglie wave corresponding to a particle of mass m and velocity v has a wavelength associated with it

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h/mv

hm v

mh/v

m/hv

The fundamental unit which has same power in the dimensional formula of surface tension and viscosity is:

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Mass

Length

Time

None

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in he form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

What remains constant in the field of central force?

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Potential energy

Kinetic energy

Angular momentum

Linear momentum

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