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.


d

Physics & Space Science

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Physics & Space Science

This graph shows how the apparent brightness of an eclipsing binary system changes with time. Which of the four labeled regions represents the system at a time when one star is eclipsing the other?

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Physics & Space Science