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What is the total power consumed in a circuit with a current of 5A and a total r

Practice Questions

Q1
What is the total power consumed in a circuit with a current of 5A and a total resistance of 4Ω?
  1. 10W
  2. 20W
  3. 30W
  4. 40W

Questions & Step-by-Step Solutions

What is the total power consumed in a circuit with a current of 5A and a total resistance of 4Ω?
Correct Answer: 100W
  • Step 1: Identify the formula for power in a circuit, which is P = I^2 * R.
  • Step 2: Substitute the given current (I) into the formula. Here, I = 5A.
  • Step 3: Calculate I^2, which is 5^2 = 25.
  • Step 4: Substitute the total resistance (R) into the formula. Here, R = 4Ω.
  • Step 5: Multiply the result from Step 3 by the resistance from Step 4. So, 25 * 4 = 100.
  • Step 6: The total power consumed in the circuit is 100W.
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