Question

398. A wire 50 cm long and 1 mm² in cross-section
carries a current of 4 A when connected to a 2 V
battery. The resistivity of the wire is
(a) 4 x 10-6 22 m (b) 1 x 10-62 m
(c) 2 x 10-72 m (d) 5 x 10-72 m (1994)​

Answer 1

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