When a resistance of 100 is connected in series with a galvanometer of resistance G , its range is V . To double its range a resistance of 1000 is connected in series. The value of G is

Step-by-step solution

When a resistance of 100 is connected in series current, i= 2 V 100+R when a resistance of 1000 is connected in series the its range double current, i= 2 V 1100+R From above equations aligned & V 100+R = 2 V 1100+R & R=900 aligned