In a meter bridge, the wire of length 1 m has a non-uniform cross-section such that, the variation dR/dl of its resistance R with length l is dR/dl ∝ 1/√l. Two equal resistance are connected as shown in the figure. The galvanometer has zero deflection when the jockey is at point P. What is the length AP?
(1) 0.2m
(2) 0.25m
(3) 0.3m
(4) 0.35m
