A Hartnell governor has its controlling force (Fc) given by Fc = ar + – McqOptions

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1.	A Hartnell governor has its controlling force (F_c) given by F_c = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when
A.	a is + ve and b = 0
B.	a = 0 and b is +ve
C.	a is +ve and b is -ve
D.	a is +ve and b is also +ve
Answer» B. a = 0 and b is +ve

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A Hartnell governor has its controlling force (F<sub>c</sub>) given by F<sub>c</sub> = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when