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Alternating Current — Physics STD 12 Science — Question

Gujarat 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
    $20Hz.$
  • ✓
    $50Hz$.
  • C
    $200Hz.$
  • D
    $500Hz.$
✓

Answer

Correct option: B.
$50Hz$.

Frequency of the source is remain constant $= 50Hz.$

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