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Two wires have their lengths. diameters ...

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

A

5 ohm

B

10 ohm

C

20 ohm

D

40 ohm

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The correct Answer is:
B
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