Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
When a potential difference is applied across, the current passing through an insulator at 0 K is zero a semiconductor at 0 K is zero a p-n junction diode at 300 K is finite, if it reverse biased (4) a metal at 0 K is finiteA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
At 0 K, a semiconductor becomes a perfect insulator. Therefore, at 0 K, if some potential difference is applied across an insulator or semiconductor, current is zero. But a conductor will become a superconductors at 0 K. Therefore, current will be infinite. In reverse biasing at 300 K through a p-n junction diode a small finite current flows due to minority charge carriers.
You need to login to perform this action.
You will be redirected in
3 sec
