You have a summer job as an assistant technician for a telephone company in California. During a recent earthquake, a 1.0-mile long underground telephone line is crushed at some point. This telephone line is made up of two parallel copper wires of the same diameter and same length, which are normally not connected. At the place where the line is crushed, the two wires make contact. Your boss wants you to find this place so that the wire can be dug up and fixed. You disconnect the line from the telephone system by disconnecting both wires of the line at both ends. You then go to one end of the line and connect one terminal of a 6.0-V battery to one wire, and the other terminal of the battery to one terminal of an ammeter. When the other terminal of the ammeter is connected to the other wire, the ammeter
You have a summer job as an assistant technician for a telephone company in California.
During a recent earthquake, a 1.0-mile long underground telephone line is crushed at
some point. This telephone line is made up of two parallel copper wires of the same
diameter and same length, which are normally not connected. At the place where the
line is crushed, the two wires make contact. Your boss wants you to find this place
so that the wire can be dug up and fixed. You disconnect the line from the telephone
system by disconnecting both wires of the line at both ends. You then go to one end of
the line and connect one terminal of a 6.0-V battery to one wire, and the other terminal
of the battery to one terminal of an ammeter. When the other terminal of the ammeter
is connected to the other wire, the ammeter shows that the current through the wire is
1.0 A. You then disconnect everything and travel to the other end of the telephone line,
where you repeat the process and find a current of 1/3 A
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