Consider the principle that the torque in a rotating machine is proportional to peak of stator MMF(Fs), rotor MMF(Fr) and the angle between them(‚âà√≠¬¨‚Ä¢). Following statements relate to Fs,Fr and ‚âà√≠¬¨‚Ä¢ in different machine?#

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‚âà√≠¬¨‚Ä¢ is variable in induction machine

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‚âà√≠¬¨‚Ä¢ is fixed in DC machine

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Fs is fixed in DC shunt machine

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Fr is fixed in synchronous machne

1.	Consider the principle that the torque in a rotating machine is proportional to peak of stator MMF(F_s), rotor MMF(F_r) and the angle between them(‚âà√≠¬¨‚Ä¢). Following statements relate to F_s,F_r and ‚âà√≠¬¨‚Ä¢ in different machine?#
A.	‚âà√≠¬¨‚Ä¢ is fixed in DC machine
B.	F<sub>s</sub> is fixed in DC shunt machine
C.	‚âà√≠¬¨‚Ä¢ is variable in induction machine
D.	F<sub>r</sub> is fixed in synchronous machne
Answer» C. ‚âà√≠¬¨‚Ä¢ is variable in induction machine

Consider the principle that the torque in a rotating machine is proportional to peak of stator MMF(F_s), rotor MMF(F_r) and the angle between them(‚âà√≠¬¨‚Ä¢). Following statements relate to F_s,F_r and ‚âà√≠¬¨‚Ä¢ in different machine?#

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