When a galvanometer is shunted by resistance S, then its current capacity increases n times. If the same galvanometer is shunted by another resistance S', then its current capcity will increase by n' is given by

Options

A. `((n+1)S)/(S')`
B. `(S(n-1)+S')/(S')`
C. `(n+S)/(S')`
D. `(S(n-1)-S')/(S')`

Answer

B