To increase the range of an ammeter to n times, the value of shunt reuired is ( G = resistance of galvanometer )
 
1. G / n
2. G / n - 1
3. ( n - 1 ) / G
4. nG

Asked by rajeshtitu | 17th Jul, 2016, 08:57: PM

Expert Answer:

begin mathsize 12px style Shunt space Resistance comma space straight S space equals fraction numerator straight I subscript straight g over denominator straight I minus straight I subscript straight g end fraction straight G
Toincrease space the space range space of space ammeter space by space straight n space times comma space straight I equals nI subscript straight g.
Thus comma space the space resistance space of space the space shunt space becomes
Shunt space Resistance comma space straight S space equals fraction numerator straight G over denominator straight n minus 1 end fraction end style

Answered by Yashvanti Jain | 18th Jul, 2016, 11:30: AM