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A small segment of wire in FIGURE Q23.4 contains 10 nC of charge.
a. The segment is shrunk to one-third of its original length. What is the ratio
b. A proton is very far from the wire. What is the ratio
c. Suppose the original segment of wire is stretched to 10 times its original length. How much charge must be added to the wire to keep the linear charge density unchanged?
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