question_answer

Find equivalent resistance between X and Y

A)  R                           

B)         R/L

C)  2 R                        

D)         5 R

Correct Answer: A

Solution :

From balanced condition of W.S.B., current through branch BE = 0 So, equivalent circuit will reduced to \[{{R}_{equ}}=\frac{(R+R)\,(R+R)}{(R+R+R+R)}=\frac{4{{R}^{2}}}{4R}=R.\]