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Electromagnetic Induction — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction1 Mark
MCQ
Comment on the statement given below:
In self-inductionWhen the current in a coil is increasing, induced emf opposes it
When the current in a coil is decreasing, induced emf supports it
  • A
    A is true, B is false
  • B
    A and B are false
  • C
    A and B are true
  • D
    A is false, B is true
✓

Answer

  1.  A is true, B is false

Explanation:

In self-induction,induced emf always opposes when the current in a coil is changing either increasing or decreasing.

So, A is true, B is false because when the current in a coil is increasing or decreasing, induced emf opposes it.

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