Assertion (A) : It is more difficult to push a magnet into a coil with more number of turns. Reason (R) :…

Assertion (A) : It is more difficult to push a magnet into a coil with more number of turns. Reason (R) : The emf induced in a coil opposes the motion of a magnet when it is moved towards the coil.
  1. A is false, R is true
  2. Both A and R are true. R is correct explanation of A
  3. A is true, R is false
  4. Both A and R are true. R is not correct explanation of A

Solution

(A) It is more difficult to push a magnet into a coil with large turns because of opposition caused by induced current. (B) The emf induced in a coil always opposes the motion of a magnet when it is moved towards the coil. It was experimentally verified by lenz law. So both $A$ and $R$ are true. $R$ is correct explanation of $A$.

Asked in: AP EAMCET 2017 (26 Apr Shift 1)

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