Question

A 0.75 Tesla bar magnet is placed inside of a coil made up of 350 turns of wire, each loop having an area of 0.002 m^2.
How much electromagnetic flux is created when the magnet is quickly pulled out of the coil?
How much voltage is induced in the coil if the magnet is removed in
a. 1 second?
b. 0.5 seconds?

Answer 1

In this case, flux is removed, not created.
The original flux is N*A*B = 350*.002*0.75
Divide that by the removal time to get the induced voltage