What is the power (in watts) of a circuit that has a total voltage of 10 volts and a current of 2 amps?

To determine the power of a circuit, the formula used is P = V × I, where P represents power in watts, V represents voltage in volts, and I represents current in amps. In this scenario, you have a total voltage of 10 volts and a current of 2 amps.

Substituting the values into the formula gives:

P = 10 volts × 2 amps = 20 watts.

This calculation shows that the power of the circuit is indeed 20 watts. Understanding this relationship between voltage, current, and power is crucial for analyzing electrical circuits. The correct choice aligns with the fundamental electrical principles that dictate how power is computed in a circuit.