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Electromagnetic Induction — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction1 Mark
MCQ
Which of the following defines electromagnetic induction:
  • A
    When the magnetic field associated with a coil changes, an induced electric current flows through the coil.
  • B
    Electric current induces magnetic field near the wire carrying current.
  • C
    Two permanent magnets exert force on each other.
  • D
    Electrolyte disintegrates into ions in a battery.
✓

Answer

  1. When the magnetic field associated with a coil changes, an induced electric current flows through the coil.

Explanation:

The magnetic field associated with a coil is the magnetic flux flowing normally to the surface area of the current-carrying coil. When it changes, an emf is produced opposing the cause. This is the principle of Electromagnetic induction.

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