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What is the power consumed by a 120 V AC circuit with a current of 3 A?

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Question: What is the power consumed by a 120 V AC circuit with a current of 3 A?

Options:

  1. 360 W
  2. 120 W
  3. 240 W
  4. 180 W

Correct Answer: 360 W

Solution: 

Power (P) is calculated as P = V * I = 120 V * 3 A = 360 W.

What is the power consumed by a 120 V AC circuit with a current of 3 A?

Practice Questions

Q1
What is the power consumed by a 120 V AC circuit with a current of 3 A?
  1. 360 W
  2. 120 W
  3. 240 W
  4. 180 W

Questions & Step-by-Step Solutions

What is the power consumed by a 120 V AC circuit with a current of 3 A?
  • Step 1: Identify the voltage (V) in the circuit. In this case, V = 120 volts.
  • Step 2: Identify the current (I) in the circuit. Here, I = 3 amperes.
  • Step 3: Use the formula for power (P), which is P = V * I.
  • Step 4: Substitute the values into the formula: P = 120 V * 3 A.
  • Step 5: Calculate the power: P = 360 watts.
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