Electrical Machines A 500 V, 55 kVA single phase alternator has an effective resistance of 0.5 Ω. An excitation current of 10 A produces 200 A armature current on short circuit and an emf of 450 V on per circuit. The synchronous reactance will be 25.564 Ω. 2.241 Ω. 2.781 Ω. 2.74 Ω. 25.564 Ω. 2.241 Ω. 2.781 Ω. 2.74 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following transformer insulating oil generally used in India? Olefin based insulating oil. Aromatics based insulating oil. Naphtha based insulating oil. Paraffin based insulating oil. Olefin based insulating oil. Aromatics based insulating oil. Naphtha based insulating oil. Paraffin based insulating oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor? 900 rpm 1000 rpm 950 rpm 850 rpm 900 rpm 1000 rpm 950 rpm 850 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Neglecting all losses, the developed torque (T) of DC separately excited motor, operating under constant terminal voltage is reduced to its output power (P) as T2 ∝ P3. T ∝ √P. T ∝ P. T is independent of P. T2 ∝ P3. T ∝ √P. T ∝ P. T is independent of P. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power factor of squirrel cage induction motor is low at rated load only low at light loads only both A and B low at heavy loads only low at rated load only low at light loads only both A and B low at heavy loads only ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ratio of starting torque to full load torque is minimum in Shunt motor. Series motor. Differential compound motor. Cumulative compound motor. Shunt motor. Series motor. Differential compound motor. Cumulative compound motor. ANSWER DOWNLOAD EXAMIANS APP
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