Question # 1

The number of lines per unit area passing perpendicular through an area is called

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Flux

Electric intensity

Both (a) , (b)

None of these

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

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Flux density

Electric flux

Magnetic flux

Magnetic field strength

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

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Perpendicular to field

Parallel to field

At an angle of 60 ^o to the field

None of these

Before and after nuclear reaction the number of protons and neutrons:

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Must be different

Must be decreased

Must be increased

Remains same

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

If the north pole of a magnet moves away from a metallic ring

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Clockwise

Anticlockwise

First clockwise and then anticlockwise

None of above

Electromagnetic induction obeys law of conservation

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Charge

Energy

Momentum

Mass

The negative of the potential gradient is

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Electrostatic force

Electromotive force

Potential difference

Electric field intensity

Selenium is

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Insulator is dark

Insulator in light

Conductor in dark

Semi conductor in dark

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

The drift velocity is of order:

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10^-13m/s

10³ m/s

10^-3m/s

10^-4m/s

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these

The moderator used in a nuclear reactor

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Sodium

Uranium

Graphite

Cadmium

Mutual induction play role in.

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Generator

D.C. motor

Galvanometer

Transformer

De-Broglie waves are associated with

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Moving charged particles only

Moving neutral particles only

All moving particles

All parties whether in motion or at rest

A photon while passing thorugh a magnetic field are deflected towards:

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North pole

South pole

Are ionized

None of these

X- ray diffraction reveals that these are

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Particle type

Wave type

Both wave and particle

None of above

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