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? none of above. 4575.4 r.p.m. 1037.5 r.p.m. 1130 r.p.m. none of above. 4575.4 r.p.m. 1037.5 r.p.m. 1130 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Iron losses in a DC machine are independent of variation in load. speed. voltage. speed and voltage. load. speed. voltage. speed and voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main purpose of providing tertiary winding in a three phase transformer is to carry extra load. to suppress harmonic and unbalance in voltage. to interconnect three voltage systems. None of these to carry extra load. to suppress harmonic and unbalance in voltage. to interconnect three voltage systems. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by Armature resistance. Residual magnetism of the generator. None of above. Field resistance. Armature resistance. Residual magnetism of the generator. None of above. Field resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking is very effective for separately excited motors. shunt motors. series motors. differential compound motors. separately excited motors. shunt motors. series motors. differential compound motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase, 2 KV alternator has an armature resistance of 0.8 ohms and 4.94 ohms respectively. The voltage regulation of the alternator at 100 a load 0.8 loading power factor is 7%. 14%. 8.9%. 0%. 7%. 14%. 8.9%. 0%. ANSWER DOWNLOAD EXAMIANS APP
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