What is the total power in a circuit with a 30V source and a 10Ω resistor?

Practice Questions

Q1
What is the total power in a circuit with a 30V source and a 10Ω resistor?
  1. 90W
  2. 60W
  3. 30W
  4. 3W

Questions & Step-by-Step Solutions

What is the total power in a circuit with a 30V source and a 10Ω resistor?
  • Step 1: Identify the voltage (V) in the circuit. In this case, V = 30 volts.
  • Step 2: Identify the resistance (R) in the circuit. Here, R = 10 ohms.
  • Step 3: Use the power formula P = V^2 / R to calculate the power.
  • Step 4: Substitute the values into the formula: P = 30^2 / 10.
  • Step 5: Calculate 30^2, which equals 900.
  • Step 6: Divide 900 by 10 to find P: 900 / 10 = 90.
  • Step 7: Conclude that the total power in the circuit is 90 watts.
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