Question

#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.

Answer #1

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