Assertion (A): Induced emf produced in a coil will be more ...

CBSE Class 12 Physics 2026 All Sets Paper

Question : 15 of 16

Marks: +1, -0

Assertion (A): Induced emf produced in a coil will be more when the magnetic flux linked with the coil is more.
Reason (R): Induced emf produced is directly proportional to the magnetic flux.

Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
(A) is true but (R) is false.
Both (A) and (R) are false.

Solution:

Assertion: False. A coil may have a large magnetic flux passing through it, but if the flux remains constant (no change with time), the induced EMF will be zero. Only a changing flux produces induction.
Reason: False. The induced EMF is proportional to the rate of change of magnetic flux

(d¶hi \/dt)

, not to the flux (¶hi) itself.

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