As more resistors are added in series to a constant voltage source,the power supplied by the source
A)increases.
B)decreases.
C)does not change.
D)increases for a time and then starts to decrease.

Question

Quizplus · Accepted Answer

As more resistors are added in series, the total resistance of the circuit increases. According to Ohm's Law, if the resistance increases, the current flowing in the circuit decreases. Since power is calculated as P=VI, if current decreases the power will also decrease, so the power supplied by the source will decrease.

As More Resistors Are Added in Series to a Constant