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Question What is the equivalent resistance between A and B?

I tried to spot which resistors are connected in parallel and which in series but I just couldn't reform the combination into a solvable one. So, I tried solving this using Kirchoff's current law: possible solution

Equation 1: I1 + I2 = I

Equation 2: I3 + I4 = I1

Equation 3: I2 + I3 = I5

Equation 4: I4 + I5 = I

Solving eq 1 and 2, we get Equation 5: I3 + I4 + I2 = I

Solving eq 3 and 4, we get Equation 6: I4 + I2 + I3 = I

This obviously gets me nowhere either so I'm stumped. The teacher simply said they are all connected in parallel so the equivalent resistance is R/5. But I don't see how.

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marked as duplicate by Qmechanic Jun 29 '18 at 13:58

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  • $\begingroup$ @Qmechanic Ok I read other discussion and realised it forms a wheatstone bridge. In that case, the answer would be R. So, my teacher was wrong. Thanks. $\endgroup$ – ParkJae Jun 29 '18 at 14:36