Question

Two diametrically opposite points of a metal ring are connected to two terminals of the left gap of metre bridge. The resistance of 11Ω is connected in right gap. If null point is obtained at a distance of 45cm from the left end, find the resistance of metal ring. 

Answer 1

Given: R₂ = 11Ω, l₁ = 45cm = 45 x 10^-2m, 

 l2 = 100 - l₁ = 100 – 45 = 55 x 10^-2m