Electrical Machines In a dc machine 72 number of coils are used. Find the number of commutator segments required? 72 74 36 37 72 74 36 37 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The damper windings also called the squirrel cage windings or damper grids both (A) and (B). are provided on the stator for improving power factor. are provided in a synchronous motor to make it self starting. consists of short-circuited copper bars embedded in the field pole faces. both (A) and (B). are provided on the stator for improving power factor. are provided in a synchronous motor to make it self starting. consists of short-circuited copper bars embedded in the field pole faces. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of hysteresis losses. mechanical losses. ohmic losses. eddy current losses. hysteresis losses. mechanical losses. ohmic losses. eddy current losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ideal value of voltage regulation of a device is? ∞ 0 a finite negative value a positive finite value ∞ 0 a finite negative value a positive finite value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the synchronous reactance of alternators in which a given field current of 200 A on short circuit and a generated emf of 50 V on open circuit. Armature resistance is 0.1 ohm 1Ω. 0.5Ω. 0.23Ω. 0.25Ω. 1Ω. 0.5Ω. 0.23Ω. 0.25Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor? 850 rpm 1000 rpm 950 rpm 900 rpm 850 rpm 1000 rpm 950 rpm 900 rpm ANSWER DOWNLOAD EXAMIANS APP
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