Disconnect a small-voltage battery from a coil of many loops of wire and a large voltage is produced by
A) electrons already in the wire.
B) the sudden collapse in the magnetic field.
C) the electric field between the battery terminals.
D) latent energy in the battery.
E) the resistance of the battery to a change in polarity.

Question

Quizplus · Accepted Answer

The large voltage produced when disconnecting a small-voltage battery from a coil of many loops of wire is due to the sudden collapse of the magnetic field around the coil. This phenomenon is based on Faraday's law of electromagnetic induction, which states that a change in the magnetic environment of a coil will induce an electromotive force (EMF) in the coil.

Disconnect a Small-Voltage Battery from a Coil of Many Loops