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With increase in temperature of the cond...

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

Text Solution

Verified by Experts

The correct Answer is:
B
Semiconductors having negative temperature coefficient of resistivity whereas metals are having positive temperature coefficient of resistivity with increase in temperature the resistivity of metal increases whereas resistivity of semiconductor decreases.
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Knowledge Check

  • With increase in temperature the viscosity of

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    liquids increases and of gases decreases
    B
    liquids decreases and gases increases
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    both liquids and gases increases
    D
    both liquids and gases decreases

  • Assertion : The angle of contact of a lilquid with a solid decreases with increase in temperature. Reason : With increase in temperature, the surface tension of the liquid increases.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true and reason is false.
    D
    If both assertion and reason are false.

  • With the increase in temperature, the respiratory rate will:

    A
    decrease slowly
    B
    decrease rapidly
    C
    increase
    D
    remain unaffected

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