Question

A magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference
(a) more in (i) than in (ii) case
(b) more in (ii) than in (i) case
(c) same in both
(d) can’t say

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Answer 1

Answer:

Explanation:

More in case (i) than in case (ii)

Answer 2

The induced potential difference is (a) more in (i) than in (ii) case.

• When a magnet is moved towards the coil, the total magnetic flux linked with the coil changes.
• More field lines go through the coil when the magnet is closer to the coil and hence more is the flux.
• According to Faraday's Law of electromagnetic induction, the potential difference induced in the coil is proportional to the rate of change of the magnetic flux.
• Hence when the magnet is movie quickly, Δ∅/Δt is higher and hence the potential difference is greater.