A changing current in one loop of wire can induce a current in another loop of wire even though the wires do not touch.The induced current appears almost instantaneously for loops close together.How can this energy exchange happen?
A)This is one of those things for which science has no adequate explanation yet.
B)The second loop is affected by the thermal exchange from the heating of the first loop.
C)It is a gravitational effect on the electrons.
D)It is done via an electromagnetic wave.

Question

Quizplus · Accepted Answer

The energy exchange between the two loops of wire is done through an electromagnetic wave. The changing current in the first loop creates a magnetic field that induces an electric field in the second loop, which then results in the current being induced in the second loop. This process occurs through the propagation of electromagnetic waves, which travel at the speed of light and allow for almost instantaneous energy transfer between the two loops.

A Changing Current in One Loop of Wire Can Induce