Electrical Machines For a DC machine having P no of pair of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance? PZL/4S PZL/4Sa² PZL/4Sp² PZL/ 4Sa PZL/4S PZL/4Sa² PZL/4Sp² PZL/ 4Sa ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Over-loading for long period. Over-excitation. Small and constant load. Periodic variation of load. Over-loading for long period. Over-excitation. Small and constant load. Periodic variation of load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 4.76%. 3.76%. 2.56 %. 2.57 %. 4.76%. 3.76%. 2.56 %. 2.57 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 500 V, 120 KW, 50 Hz, star connected synchronous motor operating at 0.8 power factor leading has full load efficiency of 91%. The armature resistance is equal to 0.08Ω. The magnitude of armature current is nearly equal to 173 A. 240 A. 190 A. 127 A. 173 A. 240 A. 190 A. 127 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a practical synchronous motor the pull out torque will occur when the torque angle is nearly equal to 45°. 30°. 75°. 0°. 45°. 30°. 75°. 0°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 0 Hz 50 Hz 5 Hz 1 Hz 0 Hz 50 Hz 5 Hz 1 Hz ANSWER DOWNLOAD EXAMIANS APP
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