SOLUTION: 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 resistanc

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Question 767698: 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 12 volts through this wire and measure 100 milliamps of current. If I cut the wire in half and pass 24 volts through it, how many milliamps of current will I measure?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+R+=+V%2FI+
+R+=+12%2F.1+ ( .1 A = 100 mA )
+R+=+120+
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+R+=+24+%2F+I+
+60+=+24+%2F+I+ ( R is 1/2 of what it was before )
+I+=+24%2F60+
+I+=+.4+ A
+I+=+400+ mA