Question

What is the forward biased voltage for germanium?

• A. zero
• B. 10^–2 A
• C. 10^–1 A
• D. 10^–3 A

Answer 1

The correct option is B 10^–2 A

Germanium diodes have a forward voltage of approximately 0.3 volts. When a diode is connected in a forward bias condition, a negative voltage is applied to the N-type material and a positive voltage is applied to the P-type material. If this external voltage becomes greater than the value of the potential barrier, approx. 0.7 volts for silicon and 0.3 volts for germanium, the potential barriers opposition will be overcome and current will start to flow.