Question

factor determining electro magnetic induction

Answer 1

Magnetic strength of the core in the coil of wire. (stronger --> bigger emf)

Number of turns of wire in the coil (more turns --> bigger emf)

The cross-sectional area of the coil (bigger area --> bigger emf). (This could also be seen as the angle you point the magnet at the coil, because flux linkage is basically the same as flux cutting.)

How fast you move the magnet into/out of the coil. (Faster --> bigger emf)

But Faraday's law seems to not show all four of these:

induced emf=NΔϕΔtinduced emf=NΔϕΔt.

(Sorry I don't know calculus yet which is why I didn't use the calculus version)

This equation shows that induced emf only depends on two things:

Number of turns of wire NN.

How fast you move the magnet.

Where did the others go? :

Area of the coil.

Magnetic strength of the core.

Answer 2

1. strength of magnetic field
2.no. of turns of the coil
3.material on which coil is wound