How is the steady state stability related with the air gap density?
(a) air gap density is directly proportional to the steady state stability
(b) air gap density is indirectly proportional to the steady state stability
(c) air gap density is directly proportional to the square of the steady state stability
(d) air gap density is directly proportional to the square of the steady state stability
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Question is taken from Synchronous Machines Output Equation in portion Design of Synchronous Machines of Design of Electrical Machines