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Solar Cell

In a solar ce...

Question

In a solar cell, electrons of depletion region jumps from valence band to conduction band after absorbing photons.

A

False

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B

True

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Solution

The correct option is B True

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Q. Assertion: Electrical conductivity of semiconductors decreases with increasing temperature.
Reason: With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

Assertion: The electrical conductivity of a semiconductor increases with increase in temperature.

Reason: With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

STATEMENT-1 : Electrical conductivity of semiconductors increases with increasing temperature.
STATEMENT-2 : With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

Q. Assertion :If there is some gap between the conduction band and the valence band, electrons in the valence band all remain bound, and no free electrons are available in the conduction band. Reason: Some of the electrons in the valence band may gain external energy to cross trhe gap between the conduction band and the valence band.

Q. Assertion :We kn ow that a conduction band is an empty band just above the valence band into which electrons can pass. Reason: In conductors , the valence band is itself the conduction band.

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