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JAMB Physics 2011 Question 44

Question 44

Alternating Current Circuits

In an a.c circuit, the ratio of r.m.s value to peak value of current is

  1. A.1/√2
  2. B.√2
  3. C.2
  4. D.1/2
Show the answer and explanation

Answer: A (1/√2)

Explanation

For a sinusoidal a.c., Irms = I0/√2, so the ratio r.m.s. : peak = 1/√2 (about 0.707).