How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes?

To determine the power delivered by a voltage of 12 volts DC and a current of 2.5 amperes, one can use the formula for electrical power, which is given by:

Power (P) = Voltage (V) x Current (I)

In this case, you would substitute the provided values into the formula:

P = 12 volts x 2.5 amperes

Calculating that gives:

P = 30 watts

This is why the answer of 30 watts is correct. It accurately reflects the power being delivered when multiplying the voltage by the current.

In context, the other answer choices do not align with this calculation based on the definitions and relationships of voltage, current, and power.