JEE Physics 2023 Question with Solution

Given: Assertion $A$ states that in a forward biased $p$-$n$ junction, diffusion current is greater than drift current in magnitude.

Find: Whether Assertion $A$ and Reason $R$ are correct.

In a forward biased $p$-$n$ junction, the potential barrier decreases, so majority charge carriers cross the junction more easily. This increases the diffusion current significantly, while drift current does not become greater than diffusion current.

Reason $R$ says that diffusion currents are from the $n$-side to the $p$-side if the junction is forward biased. This statement is not correct as a complete reason for the assertion in the given context.

Therefore, Assertion $A$ is correct but Reason $R$ is not correct. The correct option is C.