NEET Physics Question - Semiconductor Physics - Properties of Semiconductors

Assertion (A): Conductivity of intrinsic semiconductor is less as compared to extrinsic semiconductor.

Reason (R): With increase in temperature conductivity of semiconductor increases.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Concept: Semiconductor conductivity.
Intrinsic semiconductors have fewer free charge carriers than extrinsic (doped) semiconductors, so (A) is true. Increasing temperature generates more carriers in semiconductors, increasing conductivity, so (R) is true. However, (R) describes temperature dependence, not the difference between intrinsic and extrinsic. Thus, (R) is not the correct explanation for (A).

Rankers Physics

Semiconductor Conductivity and Temperature

Solution:

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