How much current is drawn by a 12-volt, 30-watt light bulb?

To find the current drawn by a component when you know its power and voltage, you need to use the power formula: P = I x E (Power equals Current times Voltage). Rearranging the formula to solve for current (I), you get I = P / E. By plugging in the given values, you divide the power of 30 watts by the voltage of 12 volts. Calculating 30 divided by 12 gives you exactly 2.5 amperes. This makes 2.5 amperes the correct answer, while distractors incorrectly result from reversing the division (12 / 30 = 0.4) or using the wrong mathematical operations.