# A Very Long Wire

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.

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