Electrical Machines For P pole machine relation between electrical degrees and mechanical degrees is θelec = θmech θelec = 2/P*θmech θelec = P/2*θmech θelec = 4/P*θmech θelec = θmech θelec = 2/P*θmech θelec = P/2*θmech θelec = 4/P*θmech ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding dc machines : 1. possible resistance of shunt-field winding is 1 Ω 2. possible resistance of series-field winding is 1 Ω 3. electrographite brushes are used for 230 V, 10 A machines 4. Copper-graphite brushes are used for 230 V, 10 A machines 5. Possible armature-circuit resistance is 1 Ω From these, the correct statements are 2, 4 ,5 1, 4 1, 3, 5 2, 3 , 5 2, 4 ,5 1, 4 1, 3, 5 2, 3 , 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere. 120 volt. 218.5 volt. None of these. 220.4 volt. 120 volt. 218.5 volt. None of these. 220.4 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor speed of an induction motor is given by Nr = 120f / p × (1-s). None of these Ns = 120f / p × ( 1 - s ). Ns = 120f /p × ( 1 - r). Nr = 120f / p × (1-s). None of these Ns = 120f / p × ( 1 - s ). Ns = 120f /p × ( 1 - r). ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by rotor of a dc machine. stator of a induction machine. stator of a dc machine. rotor of an synchronous machine. rotor of a dc machine. stator of a induction machine. stator of a dc machine. rotor of an synchronous machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor is used in paper machines? Separately excited DC motor. DC series motor. DC compound motor. DC Shunt motor. Separately excited DC motor. DC series motor. DC compound motor. DC Shunt motor. ANSWER DOWNLOAD EXAMIANS APP
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