Find the equivalent resistance between `A` and `B`.
(a)
(b)

Explanation

(a) The points connected by a wire are at same potential or same points, redraw the diagram, by placing the points of same potential at one place and then solve for equivalent resistance.
`A` and `Y` are at same potential , `B` and `X` are at same potential.
`(1)/(R_(eq)) = (1)/(8 R) + (1)/(12 R) + (1)/(24 R) = (3 + 2 +1)/(24 R)`
`R_(eq) = 4 R`.
(a) ,
(b)
( c)
(d)
(e ) .