Three resistors,each of different value,are used in a circuit with a power source supplying 12 volts.For which of the following resistor combinations is the total power supplied the greatest?
A)This cannot be found until it is known which resistor is in series with the parallel pair.
B)all three resistors in series
C)two of the resistors in parallel with the third resistor in series with the parallel pair
D)all three resistors in parallel

Question

Quizplus · Accepted Answer

When resistors are connected in parallel, the total resistance decreases, leading to an increase in the total current drawn from the power source. Since power (P) is calculated as P = V^2 / R (where V is the voltage and R is the total resistance), a lower total resistance results in a higher power consumption. Therefore, with all three resistors in parallel, the circuit draws the most power from the 12-volt source.

Three Resistors,each of Different Value,are Used in a Circuit with a Power