Semiconductor Principles

What is the voltage across R1 if the P-N junction is made of silicon?

A 12 V

B 11.7 V

C 11.3 V

D 0 V

ANS:C - 11.3 V

SI cut off voltage is 0.7.
Load voltage is 12.

So, the voltage across 1ohm resistor is VR=vl-vsi=12-0.7 = 11.3.

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