Question

What factors allow the direction of induced emf

Answer 1

Dear student,

1. Stronger the Magnetic strength of the core in the coil of wire more emf is induced. (stronger --> bigger emf)

2. Increase the number of turns of wire in the coil more emf is induced.

3. Increases the cross-sectional area of the coil more emf id induced.

4. How fast you move the magnet into/out of the coil more emf is

Induced emf = $-N\frac{d\varphi }{dt}$
Here negative sign shows emf increases in opposite to magnetic flux.
Regards