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Twelve wires of equal length and same cr...

Twelve wires of equal length and same cross-section are connected in the form of a cube. If the resistance of each of the wires is R, and the effective resistance between the two diagonal ends is `R_(e)`, then the ratio `R/R_(e)` is equal to __.

A

2 R

B

12 R

C

`5/6` R

D

8 R

Text Solution

Verified by Experts

The correct Answer is:
C
Loop ABCDVA
`-IR -1/2 R - IR + V= 0`

`rArr V/I = 5/2 R`
`V/(3I) = 5/6 R`
`R_(eq) = (5R)/6`
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