A 7805 regulator has a +20 V input. If the input and output pins of the regulator are shorted together by a solder bridge, the output voltage will be
A)0.7 V.
B)+20 V.
C)+5 V.
D)0 V.

Question

Quizplus · Accepted Answer

When the input and output pins of a 7805 voltage regulator are shorted together, the regulator cannot regulate the output voltage, resulting in the output voltage being equal to the input voltage, which is +20 V.

A 7805 Regulator Has a +20 V Input