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

Two wires have their lengths, diameters and resistivities all in the r

1.	Two wires have their lengths, diameters and resistivities all in the ratio of 1 : 2 : 1. 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» C. 20 ohm

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

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