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Assertion with the increase in temperat...

Assertion with the increase in temperature the conductivity of intrinsic semicionductors increases
Reason The increase in temperature result in increase in thermal energy which cause electrons to jump to the condluction energy band

A

If both asssertion and reason are correct and reason is a correct explanation of the assertion.

B

if both assertion and reason are corect but reason is not the correct explanation of assertion.

C

If assertion is correct but reason is incorrect.

D

If assertion is incorrect but reason is correct

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Increase in temperature decreases the conductivity of metallic conductors. Give a reason.

___ of an intrinsic semiconductor increases with increase in temperature but its ____ decreases with increase in temperature.

Knowledge Check

  • With increase in temperature of the conductivity of

    A
    metals increases and of semiconductor decreases.
    B
    semiconductors increases and of metals decreases.
    C
    in both metals and semiconductors increases
    D
    in both metals and semiconductor decreases

  • On increasing temperature, the conductivity of pure semiconductors

    A
    decreases
    B
    increases
    C
    remains unchanged
    D
    becomes zero

  • The conductivity of a semiconductor increases with increase in temperature because

    A
    (a) number density of free current carries increases
    B
    (b) relaxation time increases
    C
    both number density of carriers and relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density .
    D
    (d) number density of current carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increases in number density

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