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

Multiple Choice

Disconnect a small-voltage battery from a coil of many loops of wire and a large voltage may be produced by

A) the sudden collapse in the magnetic field.
B) latent energy in the battery.
C) the resistance of the battery to a change in polarity.
D) electrons already in the wire.
E) the electric field between the battery terminals.