The barrier voltage of PN junction for germanium is about_________

The barrier voltage of PN junction for germanium is about_________

Right Answer is:

0.3 V

SOLUTION

⇒ The opposite charges that build upon each side of the junction create a voltage, referred to as the barrier voltage.

⇒ It can be represented as an external voltage source, even though it exists across the PN junction.

⇒  The barrier voltage is quite small, measuring only several tenths of a volt.

⇒ Typically, the barrier voltage is 0.3 V for a germanium PN junction and 0.7 V for a silicon PN junction.

⇒ This voltage becomes apparent when an external voltage source is applied. 

⇒ A diode requires that the potential barrier voltage of its PN junction must be overcome before it can be forward-biased. 

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