P-N Junction Diode
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 -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
Show answer and solution
Answer: (b)
- Assertion: in forward bias the barrier is lowered, so diffusion current exceeds drift current. Correct.
- Reason: holes diffuse p to n and electrons n to p, so the diffusion current is from p side to n side, not n to p. Incorrect.
- So the answer is (b).