Engineering
Physics
Semiconductors
Question

The characteristic curve for a diode is shown in the figure for forward bias mode. The cut-in voltage for this diode is approximately –

1 V

0.8 V

0.5 V

> 1 V

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Solution

In a junction diode, the cut-in voltage (also known as the forward threshold voltage or turn-on voltage) is the minimum voltage required to overcome the potential barrier of the p-n junction and allow significant current to flow in the forward direction.