A galvanometer having a coil resistance of 60 `Omega` shows full scale deflection when a current of 1.0 amp passes through it. It can be converted into an ammeter to read currents upto 5.0 amp by :

Options

A. `(a)/(10)`
B. `(a)/(8)`
C. `(a)/(12)`
D. `(a)/(3)`

Answer

A

Explanation

`Y_(cm) = (m_(1)y_(1) + m_(2)y_(2) + m_(3)y_(3))/(M_(1) + M_(2) + M_(3))`
`Y_(cm) = (6m(o) + m( + a) + m(a) + m(-a) + m(0))/(10m), Y_(cm) = (a)/(10)`