Electrical Machines Rotating magnetic field is produced in an induction motor because of None of these stator winding. rotor winding. either stator winding or rotor winding. None of these stator winding. rotor winding. either stator winding or rotor winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 48.0%. 88.8%. 59.2%. 57.1%. 48.0%. 88.8%. 59.2%. 57.1%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Direct-on-line (DOL) starters are not suitable for starting large DC motors, because the starting current will be enormously high. the motor may not start. the starting torque becomes low. the motor may run away. the starting current will be enormously high. the motor may not start. the starting torque becomes low. the motor may run away. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines _____________ types of induction motor are widely used. Single phase IM. Three phase IM. Slip ring IM. Squirrel cage IM. Single phase IM. Three phase IM. Slip ring IM. Squirrel cage IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series 66.91 V. 56.91 V. 86.91 V. 76.91 V. 66.91 V. 56.91 V. 86.91 V. 76.91 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation. increase remain the same. be unpredictable. decrease. increase remain the same. be unpredictable. decrease. ANSWER DOWNLOAD EXAMIANS APP
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