Question

The north pole of a magnet is brought down along the axis of a horizontal circular coil figure. As a result, the flux through the coil changes from 0.35 weber to 0.85 weber in an interval of half a second. Find the average emf induced during this period. Is the induced current clockwise of anticlockwise as you look into the coil from the side of the magnet ?

Answer 1

$\Phi$ = 0.35 weber,

${\Phi }^2$ = 0.85 weber,

$d\Phi ={\Phi }^2-{\Phi }^1$

= (0.85 - 0.35) weber

= 0.5 weber, dt = 0.5 sec

e = $\frac{d\Phi }{dt}=\frac{0.5}{0.5}=1V$

The induced current is anticlockwise as seen from above