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MHT CET Physics question

PhysicsCurrent ElectricityMHT CET

Two wires of the same metal have same length, but their cross-sections are in the ratio 3 : 1. They are joined in series. The resistance of thicker wire is . The total resistance of the combination will be

Answer: (C)

Solution

For equal lengths R ∝ 1/A, so the thinner wire has 3 × 10 = ; in series the total is 10 + 30 =

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Question ID VK-044920