How many watts are being used in a circuit that measures 120 volts with a current flow of 15 amperes?

To determine the number of watts being used in the circuit, you can use the formula for electrical power, which is given by:

Power (in watts) = Voltage (in volts) × Current (in amperes).

In this scenario, the circuit measures 120 volts and has a current flow of 15 amperes. By plugging these values into the formula, you get:

Power = 120 volts × 15 amperes = 1800 watts.

This calculation shows that the circuit is using 1800 watts of power, making the first option the correct answer. Understanding this relationship between voltage, current, and power is fundamental when working with electrical circuits to ensure they are designed and integrated effectively.