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why does the electrical conductivity of semiconductors increase with rise in temperature?

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The electrical conductivity of semiconductor is

why does the electrical conductivity of semiconductors increse with rise in temperature?

The conductivity of a semiconductor increases with increase in temperature because

The conductivity of a semiconductor increases with increase in temperature because

The conductivity of a semiconductor increases with increase in temperature because

Assertion (A) : The electrical conductivity of a semiconductor increases with increase in temperature. Reason (R ) : With increase in temperature, large number of electrons from the valence band can jump to the conduction band.

Statement I : Electrical conductivity of semiconductors increases with rise in temperature. Statement II : There is a small energy gap between conduction band and valence band.

How does electrical conductivity of semiconductors vary with temperature?

How does the electrical conductivity of super- conductors vary with temperature ?