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JAMB Physics 2001 Question 38

Question 38

Alternating Current Circuits

In the diagram above, determine the r.m.s. current

Diagram for this question
  1. A.31 A
  2. B.48 A
  3. C.60 A
  4. D.80 A
Show the answer and explanation

Answer: B (48 A)

Explanation

Impedance Z = √(42 + 32) = 5 Ω, so Irms = 240/5 = 48 A.