Question

calculate the resistance between P and Q in the circuit shown in figure ?​

Answer 1

Answer:

One end of the leftmost and rightmost resistors are earthed and hence are at same potential and hence can be joined end to end.

In last step there are three parallel resistances R,2R, and R.

For, equivalent resistance:-

R

eq

1

=

R

1

+

2R

1

+

R

1

=

2R

2+1+2

=

2R

5

⟹R

eq

=

5

2R

Answer 2

12/7 is the required answer