Electrical Machines In case of induction motors the ratio of length to pole pitch for minimum cost, is taken as 2 to 3. 1.5 to 2. 3 to 5. 1.0. 2 to 3. 1.5 to 2. 3 to 5. 1.0. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? 20 Hz. 30 Hz. 35 Hz. Can be determined. 20 Hz. 30 Hz. 35 Hz. Can be determined. ANSWER DOWNLOAD EXAMIANS APP
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? 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. 1130 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a DC motor is 230 V, then back emf, for maximum power developed is 460 V. 230 V. 200 V. 115 V. 460 V. 230 V. 200 V. 115 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer has specifications as 250 KVA, 11000 V/415 V, 50 Hz. What are the values of primary and secondary currents? primary = 602 A, secondary = 22.7 A primary = 22.7 A, secondary = 602.4 A primary = 11.4 A, secondary = 301 A primary = 301 A, secondary = 22.7 A primary = 602 A, secondary = 22.7 A primary = 22.7 A, secondary = 602.4 A primary = 11.4 A, secondary = 301 A primary = 301 A, secondary = 22.7 A ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The field divertor resistance for a DC series motor is of order of 0.1 Ω 10 Ω 100 Ω 50 Ω 0.1 Ω 10 Ω 100 Ω 50 Ω ANSWER DOWNLOAD EXAMIANS APP
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