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MHT CET Physics question

PhysicsCurrent ElectricityMHT CET

A wire of 50 cm long and 1 mm in cross section carries a current of 4 A when connected to 2 V battery. The resistivity of the wire is

Answer: (D)

Solution

R = V/I = 2/4 = , so ρ = RA/l = (0.5 × 10⁻⁶)/0.5 = 1 × 10⁻⁶

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Question ID VK-044919