A wire 50 cm long and 1 mm2 in cross section carries a current of...

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A wire 50 cm long and 1 mm2 in cross section carries a current of 4 A when connected to a 2V battery The resistivity of the wire is 1 2 x 10 7 22 m 3 4 x 10 6 m VA 2 5 x 10 7 22 m 4 1 x 10 6 m

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