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In physics, Ohm's law says that current through a wire, I, is directly proportional to voltage, V, and inversely proportional to resistance, R :

I = V/R

It's also true that resistance is directly proportional to the length of the wire. We have a piece of wire. We pass 50 volts through this wire and measure 300 milliamps of current. If I cut the wire in half and pass 300 volts through it, how many milliamps of current will I measure?

 Feb 18, 2021
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Like so:

 

I'll let you turn the Amps into milliamps.

 Feb 18, 2021

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