Question

In a meter bridge, the null points found at a distance of 60 cm from A. If a resistance of 5 ohm is connected in series with S, then null point occurs at 50 cm from A . Determine the value of R and S

Answer 1

Answer:

3.3

Explanation:

using formula of wheatstone

R/S=Lr/Ls

5/S=60/40

S=40×5/60

S=3.3ohm

null point at 50cm then solve logical length ratio equal to 1 and resistance ratio also equal to 1