Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
**Assertion A:** Diffusion current in a $p$-$n$ junction is greater than the drift current in magnitude if the junction is forward biased.
**Reason R:** Diffusion current in a $p$-$n$ junction is from the $n$-side to the $p$-side if the junction is forward biased.
In the light of the above statements, choose the most appropriate answer from the options given below.
Answer: (B) A is correct but R is not correct
In forward bias the barrier is lowered, so diffusion dominates over drift (A correct). The diffusion current (holes moving to the $n$-side, electrons to the $p$-side) flows conventionally from the $p$-side to the $n$-side, so R is not correct.
Solution by Sreeraj P, M.Sc Physics