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 \(\SI{384400}{\kilo\meter}\).
The resistance of the wire is negligible.
by
Pranshu Gaba