Question

40.The circuit diagram shows a network of resistors each of
resistance R.
R R
What is the effective resistance between the points X and Y?

Answer 1

Answer:

The equivalent circuit is shown in fig. Since the Wheatstone's bridge is balanced, therefore no current will flow through the arm KL. Equivalent resistance between AKM=R+R=2R

Equivalent resistance between ALM=R+R=2R

The two resistances are in parallel. Hence equivalent resistance between A and B is given by

R  

′

 

1

​  

=  

2R

1

​  

+  

2R

1

​  

=  

2R

2

​  

=  

R

1

​  

⇒R  

′

=R

Answer 2

Answer:

5R/6 is the correct answer