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MHT CET20242 May 2024Evening ShiftPhysicsElectromagnetic InductionActual

The magnetic energy in an inductor changes from maximum value to minimum value in 5 ms . When connected to an a.c. source, the frequency of the source is

Options

  1. A50 Hz
  2. B200 Hz
  3. C500 Hz
  4. D20 Hz

Correct answer

A. 50 Hz

Step-by-step solution

Magnetic field energy changes from maximum to minimum in 1 4 ^ th time of a cycle aligned & T 4 =5 ~ms ~T =20 ~ms & f = 1 ~T = 1 20 10⁻³ =50 ~Hz aligned

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