The barrier voltage for germanium is _________ at 25°C.

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SSC JE Electrical 15 Nov 2022 Shift 2 Official Paper
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  1. 0.3 V
  2. 0.7 V
  3. 0 V
  4. infinity

Answer (Detailed Solution Below)

Option 1 : 0.3 V
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Barrier voltage

The minimum voltage required by a diode to conduct is known as barrier voltage.

It is also known as the cut-in voltage or knee voltage.

The barrier potential of the "Germanium" diode is 0.3 V.

The barrier potential of the "Silicon" diode is 0.7 V.

Above the knee voltage, the diode conducts and the forward current from p to n flows in the diode.

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