NEET Physics Question - Semiconductor Physics - Properties of Semiconductors

Assertion (A): Semiconductors do not obey Ohm's law.

Reason (R): Electric current is determined by the rate of flow of charge carriers.

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: Ohm's Law and current definition.
Semiconductors are non-ohmic devices, so (A) is true. Electric current is indeed the rate of flow of charge, \(I = \frac{dQ}{dt}\), so (R) is true. However, (R) is a definition of current and does not explain why semiconductors are non-ohmic. Thus, (R) is not the correct explanation of (A).

Rankers Physics

Ohm’s Law and Semiconductors

Solution:

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