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#4. A copper wire is 250 m long and it has a diameter of 0.225 mm....


#4. A copper wire is 250 m long and it has a diameter of 0.225 mm. The resistivity of copper is 1.7 x 10-8 -m. A battery of negligible internal resistance and emf of 35.0 v is connected across this wire.
a) Find the resistance of the wire.
b) Find the current through the wire.

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