Electrical Machines A 3 - Φ, 4 pole, 50 Hz induction motor 4 % slip, calculate frequency of the rotor emf? 2 Hz. 10 Hz. 3 Hz. 50 Hz. 2 Hz. 10 Hz. 3 Hz. 50 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC motor under constant terminal voltage what is the relation between torque (Te) and power (P) T∝ P² T is independent of P T∝ P T∝ P³ T∝ P² T is independent of P T∝ P T∝ P³ 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? 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. none of above. 4575.4 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dummy coils are used for mechanical balancing. reducing armature reaction. increasing efficiency. All of these mechanical balancing. reducing armature reaction. increasing efficiency. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be 4 Ω. 2 Ω. 8 Ω. 10 Ω. 4 Ω. 2 Ω. 8 Ω. 10 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In electric locomotive which of the following motor are used ? Shunt motor. Separately compound motor. DC series motor. Synchronous motor. Shunt motor. Separately compound motor. DC series motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
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