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When the reverse voltage across the Zener diode is increased _____________

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When the reverse voltage across the Zener diode is increased _____________

(a) The value of saturation current increases

(b) No effect

(c) The value of cut-off potential increases

(d) The value of cut-off potential decreases

The question was posed to me during a job interview.

This intriguing question originated from Zenner Diode topic in chapter Semiconductors of Engineering Physics II

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The correct choice is (c) The value of cut-off potential increases

To explain: As the frequency of the incident radiation increases, the kinetic energies of the emitted electron are higher and therefore require more repulsive force to be applied to stop them.

The value of saturation current increases, as the intensity of the incident radiation, increases.

The value of cut-off potential decreases, as the frequency decreases.

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