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If the current in a circuit is 5 A and the resistance is 2 ohms, what is the pow

Practice Questions

Q1
If the current in a circuit is 5 A and the resistance is 2 ohms, what is the power consumed in the circuit?
  1. 10 W
  2. 25 W
  3. 5 W
  4. 2.5 W

Questions & Step-by-Step Solutions

If the current in a circuit is 5 A and the resistance is 2 ohms, what is the power consumed in the circuit?
Correct Answer: 25 W
  • Step 1: Identify the current (I) in the circuit, which is given as 5 A.
  • Step 2: Identify the resistance (R) in the circuit, which is given as 2 ohms.
  • Step 3: Use the formula for power (P), which is P = I^2 * R.
  • Step 4: Substitute the values into the formula: P = (5 A)^2 * 2 Ω.
  • Step 5: Calculate (5 A)^2, which equals 25 A^2.
  • Step 6: Multiply 25 A^2 by 2 Ω to find the power: 25 A^2 * 2 Ω = 50 W.
  • Step 7: Conclude that the power consumed in the circuit is 50 W.
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