How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts?

To determine the current flowing in a circuit when you know the applied voltage and the power load, you can use the formula derived from Ohm’s Law and the relationship between voltage, current, and power. The formula for power (P) is given by:

P = V × I

where P is power in watts, V is voltage in volts, and I is current in amperes. By rearranging this formula to solve for current (I), we get:

I = P / V

In this scenario, the power (P) is 120 watts, and the voltage (V) is 12 volts. Plugging these values into the formula gives:

I = 120 watts / 12 volts = 10 amperes

This calculation indicates that the current flowing in the circuit is indeed 10 amperes. The choices presented include other values that do not align with this calculation based on the known relationship between voltage, current, and power, which confirms that 10 amperes is the correct answer.