Answer:
Option C
Explanation:
Given, S= G8 ............(i)
As, S=Gn−1 ............(ii)
Comparing Eqs.(i) and (ii), we get
G8=Gn−1
∴ 8=n-1
∴ n=8+1=9
Since the range of the galvanometer is increased by nine times, therefore its sensitivity reduces to 19
∴ S'= S9