A metal wire of resistance is elongated to make a uniform wire of double its previous…
PHYSICS · Single correct · A Level · Physics · Electricity · Electricity
Problem
A metal wire of resistance 3Ω is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on the circle make an angle 60∘ at the centre, the equivalent resistance between these two points is:
(1) 512Ω
(2) 25Ω
(3) 35Ω
(4) 27Ω