+4 In physics, Ohm's law says that current through a wire, , is directly proportional to voltage, , and inversely proportional to resistance, :
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 volts through this wire and measure milliamps of current. If I cut the wire in half and pass volts through it, how many milliamps of current will I measure?
