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What is the total power consumed in a circuit with a 12V battery and a 4Ω resist

Practice Questions

Q1
What is the total power consumed in a circuit with a 12V battery and a 4Ω resistor?
  1. 12W
  2. 24W
  3. 36W
  4. 48W

Questions & Step-by-Step Solutions

What is the total power consumed in a circuit with a 12V battery and a 4Ω resistor?
  • Step 1: Identify the voltage (V) of the battery, which is 12 volts.
  • Step 2: Identify the resistance (R) of the resistor, which is 4 ohms.
  • Step 3: Use the power formula P = V^2 / R to calculate the power.
  • Step 4: Substitute the values into the formula: P = (12V)^2 / 4Ω.
  • Step 5: Calculate (12V)^2, which is 144.
  • Step 6: Divide 144 by 4Ω to find the power: 144 / 4 = 36W.
  • Step 7: Conclude that the total power consumed in the circuit is 36 watts.
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