Assertion: Zener diode works on aa principle of of breakdown voltage.
Reason: Current increases suddenly after breakdown voltage.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true not but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

B

Explanation

Zener diodes are specially designed junction diodes, which can operate in the reverse breakdown voltage region continuously without being damaged. This breakdown voltage occur when reverse bias is increased beyond a particular value, the reverse current increases suddenly on increasing the reverse bias even slightly. In normal diode after this breakdown voltage, low power rating will get destroyed but Zener diode is specially designed to work in this region of biasing.