Question

electromagnetic induction using two points

Answer 1

Electromagnetic induction is an incredibly useful phenomenon with a wide variety of applications. Induction is used in power generation and power transmission, and it's worth taking a look at how that's done. There are other effects with some interesting applications to consider, too, such as eddy currents.

Answer 2

-because of the change in rate of change in number of magnetic field lines an electromotive forces induces due to which induced electric current is obtained
-induced electric current is obtained only when conductors moves in the magnetic field or the magnetic field of conductors is changed