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The resistance of a wire of length 300m & cross-section 1 mm² & resistivity 1 x 10-7ohm is |
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Answer» d) 30 Ω Resistance, R = frac{rho l}{A} Length, l = 300 m Cross-section area, A = 1.0 MM2 = 10-6 m2 Resistivity, rho = 1.0 × 10−7 Ωm Resistance, R = frac{10^{-7} TIMES 300}{10^{-6}} R = 30 Ω |
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