A galvanometer has a resistance of G ohm and range of V volt. Calculate the resistance to be used in seres with it to extend its range its renge to nV volt.

Explanation

Full scale current `i_(g)=(V)/(G)`
to change its range
`V_(1)=(G+R_(s))i_(g)`
`rArrnV=(G+R_(s))(V)/(G)`
`R_(s)=G(n-1)`