A circuit with four 20-ohm resistors operating at 1.5 amperes is powered by what voltage source?

To determine the voltage source powering the circuit, one needs to analyze the total resistance of the circuit and apply Ohm's Law. In this given scenario, there are four 20-ohm resistors.

If these resistors are connected in series, the total resistance would be the sum of all individual resistances:

Total Resistance (R) = 20 Ω + 20 Ω + 20 Ω + 20 Ω = 80 Ω.

However, if they are connected in parallel, the total resistance can be calculated using the formula for parallel resistors:

1/R_total = 1/R1 + 1/R2 + 1/R3 + 1/R4

1/R_total = 1/20 + 1/20 + 1/20 + 1/20

1/R_total = 4/20

R_total = 20/4 = 5 Ω.

Given that we are operating at a current of 1.5 amperes, using Ohm's Law (V = I * R), we can calculate the voltage for both configurations.

For the series configuration:

Voltage (V) = 1.5 A * 80 Ω = 120 V.

For the parallel configuration:

Voltage