If the current is 2.5 amperes and the voltage equals 12 volts, what is the wattage?

To calculate wattage, you can use the formula:

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

In this case, the voltage is 12 volts and the current is 2.5 amperes. Plugging these values into the formula gives:

P = 12 volts x 2.5 amperes

When you calculate this, you multiply:

12 x 2.5 = 30 watts

Thus, the wattage is 30, which confirms that the correct answer is the choice indicating 30 watts. Understanding this relationship between voltage, current, and wattage is crucial in electrical calculations, providing a foundational principle for working with electrical systems.