Question

A magnet is moved towards a coil (i) quickly (ii) slowly, then
the induced e.m.f. is

• A. larger in case (i)
• B. smaller in case (i)
• C. equal in both the cases
• D. larger or smaller depending upon the radius of the coil

Answer 1

The correct option is A larger in case (i)

$E=\frac{-d\varphi }{dt}$ where $\varphi =$ magnetic flux and $E$=emf

Hence, fast changing magnetic flux will induce larger e.m,f.

Hence, answer is option-(A).