Q. Find the equivalent resistance between points A and B in the following circuits:
(a) 5R/4
(b) 6R/4
(c) 8R/5
(d) 9R/5
Ans: (a)
Sol: The circuit is symmetry about perpendicular bisector of AB , hence remove this bisector and redraw the circuit .
Now 4R and 2R becomes in parallel