Question

The slide wire bridge AB is 100cm long. Where should the free end of the galvanometer be connected on AB so that the galvanometer may show zero deflections




please solve this problem in details​

Answer 1

Answer:

The jockey should be at 60 cm from point A

Explanation:use the formula

R/S=L1/100-L1

15/10=L1/100-L1

Answer 2

Answer:

USE the balancing condition of Wheatstone bridge here

Explanation:

$\frac{l}{100-l} = \frac{R}{S}\\\frac{l}{100-l} = \frac{15}{10}$

$\frac{l}{100-l} = \frac{3}{2} \\ 2l= 300-3l\\5l=300\\l= 60 cm$

hope it helps