Question

Current through a reverse biased p-n junction, increases abruptly at

• A. \(0.0\) V
• B. \(0.8\) V
• C. break-down voltage.
• D. knee voltage.

Hint:

The reverse current rises sharply when the reverse voltage reaches the breakdown value.

Answer 1

The Correct Option is C

Step 1: Approach
Eliminate values that apply to forward bias or to no bias.

Step 2: Elimination
$0.0$ V gives no current. $0.8$ V and the knee voltage relate to forward conduction of the diode.

Step 3: Conclusion
Only the break-down voltage causes a sudden rise of current in reverse bias.

Final Answer:
The reverse current jumps at the break-down voltage. \[ \boxed{\text{(C) }\text{break-down voltage}} \]