question_answer

Find equilvalent resistance between \[X\]and\[\text{Y}\]:

A)  R                                           

B)  R/2  

C)  2R                         

D)         5K

Correct Answer: A

Solution :

The given circuit can be shown in the following way. No current will be flown in the middle resistance. Equivalent resistance of R and R=2R Total resistance\[\begin{align}   & \frac{1}{R}=\frac{1}{2R}+\frac{1}{2R} \\  & R=R \\ \end{align}\]