I have a physAn e. m.f. is induced across a wire when it moves through the magnetic field between the poles of a magnet. Which electrical device operates because of this effect?ics exam someone please help 9th grade &

Generator.

Explanation:

In a generator, an e.m.f. is induced across a wire when it moves through the magnetic field between the poles of a magnet.

The mode of operation of a generator is that a metal core with copper tightly wound to it (conductor coil) rotates rapidly between the two (2) poles of a horseshoe magnet type. Thus when the conductor coil rotates rapidly, it cuts the magnetic field existing between the poles of the horseshoe magnet and then induces the flow of current.

pe = weightxheight = 2000x1000=2,000,000joules