What is the total resistance of a 120 volt circuit supplying a 1200 watt load?

To determine the total resistance in a circuit, you can use Ohm's Law and the power formula. The power formula states that Power (P) = Voltage (V) × Current (I), and Ohm’s Law relates voltage, current, and resistance as V = I × R.

Starting with the power formula, you can rearrange it to find the current:

I = P / V.

Substituting the given values (P = 1200 watts and V = 120 volts) gives:

I = 1200 W / 120 V = 10 A.

Now, using Ohm's Law (V = I × R), you can solve for the resistance (R):

R = V / I.

Substituting the known values gives:

R = 120 V / 10 A = 12 ohms.

This calculation confirms that the total resistance of the circuit is indeed 12 ohms, which matches the provided choice. Understanding this relationship helps clarify how voltage, current, and resistance interrelate in electrical circuits, making it essential for proper circuit analysis and design in electrical work.