How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?

To determine the power being used in a circuit, you can apply the formula:

Power (P) = Voltage (V) × Current (I).

In this case, you have a voltage of 12 volts and a current of 2.5 amperes. When you calculate the power:

P = 12 volts × 2.5 amperes = 30 watts.

This means that the circuit is consuming 30 watts of power, which corresponds to the provided answer indicating that the correct choice is indeed the one that states 30 watts.

The other values do not align with the calculations based on the standard power formula, making them invalid in this context.