How much power is being furnished to the circuit?

How much power is being furnished to the circuit?

• A. 48 watts
• B. 24 watts
• C. 2,645 watts
• D. 120 watts

Answer: (C)

Power being furnished to a circuit is the rate at which energy is supplied, which comes from multiplying the source voltage by the current drawn: P = V × I. In this scenario the supply and current combine to give P = 230 V × 11.5 A = 2645 watts. So the circuit is receiving about 2.645 kW of power. The other numbers would require different voltage or current values (for example, 12 V × 2 A = 24 W, 24 V × 2 A = 48 W, or 10 V × 12 A = 120 W), which don’t match the actual supply conditions shown in the problem.

Power being furnished to a circuit is the rate at which energy is supplied, which comes from multiplying the source voltage by the current drawn: P = V × I. In this scenario the supply and current combine to give P = 230 V × 11.5 A = 2645 watts. So the circuit is receiving about 2.645 kW of power.

The other numbers would require different voltage or current values (for example, 12 V × 2 A = 24 W, 24 V × 2 A = 48 W, or 10 V × 12 A = 120 W), which don’t match the actual supply conditions shown in the problem.