Question # 1

Energy band theory is based upon

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Hund's Rule

Heisenberg uncertainty principle

Bohr's atomic Model

Wave mechanical model

Subatomic particles are divided into groups.

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Photon

Laptons

Hadrons

All of these

An AVO meter can also be called as.

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Digital multimeter

Digital voltmeter

Digital ammeter

Digital ohm meter

Pair production cannto take place in vacuum because :

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Mass in not conserved

Momentum is not conserved

Energy is not conserved

Charge is not conserved

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

For step down transformer

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Ns>Np

Np > Ns

Ns = Np

Ns > > > Np

By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about.

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20 ms-1

10 ms-1

2 cms-1

2 ms-1

Presence of dielectric between two charges always.

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Reduces the electric force

Enhance the electric force

Does not effect electric force

Double the electric force

The negative of the potential gradient is

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Electrostatic force

Electromotive force

Potential difference

Electric field intensity

For accurate measurement of current through a circuit, the resistance of ammeter should be

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Very small

Very high

Neither small nor high

None of the above

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

If the energy of photon is 10 eV and work function is 5 eV, then the a value of stopping potential will be

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50 V

2 V

5 V

15 V

The emf induced by the motion of a conductor across a magnetic field is called:

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Motional emf

Rotational emf

Induced emf

All of above

The value of Rydberg constant is

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1.0974 x 10⁷ m^-1

1.0974 x 10^-7 m^-1

1.0974 x 10⁶ m^-1

1.0974 x 10^-6 m^-1

Which of the following is similar to electron.

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Beta particle

Alpha particle

Neutron

Proton

EMF is induced due to change in

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Charge

Current

Magnetic flux

Electric field

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

Two parallel wires carrying currents in the opposite direction.

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Repel each other

Attract each other

Have no effect upon each other

They cancel out their individual magnetic fields.

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