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Alternating Current — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsAlternating Current1 Mark
MCQ
The magnetic field energy in an inductor changes from maximum value to minimum value in 5.0ms when connected to an AC source. The frequency of the source:
  • A
    20Hz.
  • B
    50Hz.
  • C
    200Hz.
  • D
    500Hz.
✓

Answer

  1. 50Hz.

Explanation:

Frequency of the source is remain constant = 50Hz.

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