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Five resistors are connected in the configuration as shown in the figure. Calculate the equivalent resistance between the points a and b. |
Answer» Solution : To FIND the equivalent resistance between the POINTS a and b, we ASSUME that current is entering the junction a, Since all the resistances in the outside loop are the same `(1Omega)`, the current in the branches ac and ad must be equal. So the ELECTRIC POTENTIAL at the point c and d is the same hence no current flows into `5Omega` resistance. It implies that the `5Omega` has no role in determining the equivalent resistance and it can be removed. So the circuit is simplifiedas shown in the figure.  The equivalent resistance of the circuit between a and b is `R_(eq)=1Omega`. |
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