A) becomes 1/5 times
B) becomes 3/5 times
C) becomes 2/5 times
D) becomes 1/2 times
Correct Answer: B
Solution :
[b] After adding two conductors, the circuit will acquire the form shown in figure. From symmetry considerations, we calculate that the central conductor will not participate in electric charge transfer. Therefore, if the initial resistance \[{{R}_{1}}\] of the circuit was 5r, where r is the resistance of a conductor, the new resistance of the circuit will become \[{{R}_{2}}=2r+\frac{2r}{2}=3r\text{ Therefore, }\frac{{{R}_{2}}}{{{R}_{1}}}\text{=}\frac{3}{5}\text{ }\]You need to login to perform this action.
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