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Twelve resistors of equal value R are co...

Twelve resistors of equal value R are connected in the form of a cube. Effective resistance between diagonals of the cube is

A

`12/5R`

B

`5/6R`

C

`7/9R`

D

`11/6R`

Text Solution

Verified by Experts

To redraw circuit, we join resistors across points which are same potentials. This can be judged on the basis of symmetry of circuit.

`R_(eq)=R/3+R/6+R3=(2R+R+2R)/6`
`=(5R)/6 Omega`
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