Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2 A armature current at no-load, when the armature current is changed to 20 A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? 1130 r.p.m. 4575.4 r.p.m. none of above. 1037.5 r.p.m. 1130 r.p.m. 4575.4 r.p.m. none of above. 1037.5 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the brushes remain in contact with conductors which lie under north pole. lie in the inter polar gaps. lie under south pole. there is no hard and fast rule for this. lie under north pole. lie in the inter polar gaps. lie under south pole. there is no hard and fast rule for this. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two single-phase alternators operating in parallel have induced EMFs on open circuit of 230∠0° and 230∠10° volts and respective reactance of j2 Ω j3 Ω calculate the terminal voltage 300 V. 150 V. 223.V. 200 V. 300 V. 150 V. 223.V. 200 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC machine has an armature resistance 1 Ω. If the full load current is 20 A, the difference of induced voltage between generator and motor is 40 V. 0 V. 60 V. 20 V. 40 V. 0 V. 60 V. 20 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward Leonard control provides speed control in both direction. in one direction only. below rated speed. above rated speed. in both direction. in one direction only. below rated speed. above rated speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator on no-load, the air gap flux distribution in space is flat topped. triangular. pulsating. sinusoidal. flat topped. triangular. pulsating. sinusoidal. ANSWER DOWNLOAD EXAMIANS APP
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