Question

If we use `10 Omega` and `200 Omega` in place of `R` and `X` we get null point deflection.`l=33cm`. If we interchange the resistors, the null point length is found to be `67 cm`. Find end corrections `alpha` and `beta`.
A. `alpha = 1cmbeta = 1cm`
B. `alpha = 2cm, beta =1cm`
C. `alpha = 1cm beta = 2cm`
D. None of these

Answer 1

`alpha=(R_(2)l_(1)-R_(1)l_(2))/(R_(1)-R_(2))=((200)(33)-(100)(67))/(100-200)=1cm`
`beta = (R_(1)l_(1)-R_(2)l_(2))/(R_(1)-R_(2))-100=((33)(100)-(200)(67))/(100-200)100=1cm` .