Directions : In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as :
(a) If both assertion and reason are true and reason is the correct explanation of assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of assertion.
\( \mathrm{P} \)
(c) If assertion is true but reason is false.
(d) If both assertion and reason are false.
Assertion : When the current in a coil changes, it induces a back emf in the same coil.
Reason : Emf is a measure of the inertia of the coil against the change of current through it.
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