A Very Long Wire
Electricity and Magnetism
Level
2
Patrick has a wire so long that it can go to the moon and come back. Patrick made a simple circuit using this wire, a battery, a switch and a light bulb.
How much time will it take for the bulb to start glowing after the switch is closed?
Details and assumptions
The distance between Earth and Moon is about .
The resistance of the wire is negligible.
by
Pranshu Gaba