Two wires have their lengths diameters and resistivities all in the...

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Two wires have their lengths, diameters and resistivities all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohm, the resistance of the thicker wire is

A. 5 ohm

B. 10 ohm

C. 20 ohm

D. 40 ohm

Answer: Option B

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