# In an electrical cable there is a single copper wire of radius 6 mm. Its resistance is 10 Ω. The sin

Feb 3rd, 2012
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In an electrical cable there is a single copper wire of radius 6 mm. Its resistance is 10 Ω. The single wire in the cable is replaced by 5 different insulated copper wires, the radius of each wire is 2 mm. The new resistance of the cable is A 50 Ω B 2 Ω C 18 Ω D 12 Ω

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Answer on Question 42655, Physics, Electric CircuitsFor given single copper wire,R=L, where r 21R=10 is resistance,r 1=6 mm is the radius of the wire. From last formula,L is the length of the wire, R r2L= 1 .For one wire out of five of the same length as given single coppe

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