Electricity for HVACR Practice Test 2026 - Free HVACR Electricity Practice Questions and Study Guide

To determine the total power consumed by a parallel circuit, you can use the formula for power, which is calculated as the product of voltage and current. In this case, the voltage of the circuit is 120 volts and the total current drawn from the circuit is 2.7 amps.

Using the power formula:

Power (P) = Voltage (V) × Current (I)

Substituting the values:

P = 120V × 2.7A = 324W

However, it’s important to note that the individual loads in the circuit (100 ohms and 80 ohms) also play a role in how the total resistance affects the current, but since we already have the total current (2.7A) drawn from the circuit, we simply calculate the power consumed directly from the current and voltage.

In regards to the provided answer of 125W, this can lead to confusion, as that might reflect a misunderstanding of how power is distributed across the loads in a parallel circuit. The sum of the individual powers of the loads can also be calculated:

For each load:

- The current through the 100-ohm load = 120V / 100Ohms = 1.2A