Using Watt's Law, when solving for power, the current must be multiplied by the voltage.

Using Watt's Law, when solving for power, the current must be multiplied by the voltage.

• A. added to
• B. divided by
• C. multiplied by
• D. subtracted from

Answer: (C)

Power in an electrical circuit is defined by Watt's Law as the product of voltage and current: P = V × I. Because of this relationship, solving for power requires multiplying the voltage by the current; the result is the power in watts. For example, at 120 V and 2 A, P = 120 × 2 = 240 W. Using addition or subtraction wouldn’t match the law, and dividing would give a quantity with a different unit (ohms, V/A) rather than watts.

Power in an electrical circuit is defined by Watt's Law as the product of voltage and current: P = V × I. Because of this relationship, solving for power requires multiplying the voltage by the current; the result is the power in watts. For example, at 120 V and 2 A, P = 120 × 2 = 240 W. Using addition or subtraction wouldn’t match the law, and dividing would give a quantity with a different unit (ohms, V/A) rather than watts.