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Krishna Baria
Asked: 2022-11-11T14:17:14+05:30 In:

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.
A. If both the statement are TRUE and STATEMENT -2 is the correct explanation of STATEMENT -1
B. If both the statement are TRUE and STATEMENT -2 is NOT the correct explanation of STATEMENT -1
C. If STATEMENT -1 is the correcct and TRUE and STATEMENT -2 is FALSE
D. If STATEMENT -1 is the correcct and FALSE and STATEMENT -2 is TRUE

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.
A. If both the statement are TRUE and STATEMENT -2 is the correct explanation of STATEMENT -1
B. If both the statement are TRUE and STATEMENT -2 is NOT the correct explanation of STATEMENT -1
C. If STATEMENT -1 is the correcct and TRUE and STATEMENT -2 is FALSE
D. If STATEMENT -1 is the correcct and FALSE and STATEMENT -2 is TRUE
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  1. Correct Answer – A

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Sweta Dhawan
Asked: 2022-10-29T08:05:58+05:30 In:

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

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.
A. If both assertion and reason are true and the reason is the correct explanantion of the assertion
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
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  1. Correct Answer – A
    In case of semiconductors, the gap between valence band and the conduction band is small and therefore some of the electrons may jump from valence band to conduction band and thus on increasing temperature conductivity is also increased.

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