Question

A magnet is moved towards the coil (i) quickly (ii) slowly then the induced emf is

• A. Larger in case (i)
• B. Smaller in case (i)
• C. Equal in both
• D. Larger or smaller depending upon the radius of the coil

Answer 1

Answer: (B)

Smaller in case (i)

Answer 2

According to Faraday's Law: $E =\frac{ d \phi}{ dt }$ If the magnet moves quickly, the rate of change of flux is also higher, hence the EMF induced is larger in case (i).