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6. Electromagnetic induction — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics6. Electromagnetic induction1 Mark
MCQ
In a $dc$ motor, induced $e.m.f.$ will be maximum
  • ✓
    When motor takes maximum speed
  • B
    When motor starts rotating
  • C
    When speed of motor increases
  • D
    When motor is switched off
✓

Answer

Correct option: A.
When motor takes maximum speed
a
(a)Back $emf \propto speed\;of\;motor.$

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