A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when
1
a is + ve and b = 0
2
a = 0 and b is + ve
3
a is + ve and b is – ve
4
a is + ve and b is also + ve
5
Question Not Attempted