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Unilorin Post-UTME Physics 2024 (Model questions) Question 8

Question 8

Alternating Current Circuits

An alternating current has a peak value of 10A. What is its rms value?

  1. A.5.0A
  2. B.7.1A
  3. C.8.7A
  4. D.10.0A
Show the answer and explanation

Answer: B (7.1A)

Explanation

I(rms) = I(peak) ÷ √2 = 10 ÷ 1.414 ≈ 7.1 A.