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JAMB Physics 1992 Question 45

Question 45

Alternating Current Circuits

In alternating current theory, the units of impedance, r.m.s. voltage and resonance frequency are respectively equal to

  1. A.volt, ampere and hertz
  2. B.ohm, volt and hertz
  3. C.watt, ohm and radian
  4. D.ohm, hertz and joule
Show the answer and explanation

Answer: B (ohm, volt and hertz)

Explanation

Impedance is a kind of resistance (ohm), r.m.s. voltage is a voltage (volt) and frequency is in hertz.