Answer to Question #152940 in Electricity and Magnetism for Afraid

Question

What is lenz law.

Answer 1

Answer

Lenz's law

Tells that current induced in a circuit due to a change in a magnetic field is directly oppose the change in flux and to exert a mechanical force which opposes the motion of the system.

This means that the direction of the back electro motive force of an induced field opposes the changing due to the current that is its cause.

Expression can be given as below

$ϵ=-N\frac{∂Φ_B}{B∂t}$