Question

In post office box experiment, if `Q/P=1/(10)`. In (R ) if ` 142 Omega` is used then we get deflection towards right and if ` R =143 Omega` , then deflection is towards left. What is the range of unknown resistance?

Answer 1

Correct Answer - A::B::C::D
`P/Q = R/X`
`rArr X =(Q/P) R =(1/(10))R`
`R ` lies between `142 Omega` and `143 Omega`
There, the unknown resistance `X` lies between `14.2 Omega` and `14.3 Omega`.