Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 5% 25% 4% 2% 5% 25% 4% 2% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the actual arrangement of series wound generator? Armature and field both are connected. Armature and field both are in series with the load. Armature winding is in series with load. Armature and field both are parallel. Armature and field both are connected. Armature and field both are in series with the load. Armature winding is in series with load. Armature and field both are parallel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has resistance and reactance in per unit as 0.01 and 0.04 respectively. Its voltage regulation for 0.8 power factor lagging and leading will be None of these 4.8% and -3.2% 3.2% and -1.6% 6% and -4% None of these 4.8% and -3.2% 3.2% and -1.6% 6% and -4% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting the damper bars develop induction generator torque. the damper bars develop synchronous motor torque. negative sequence currents are generated. the damper bars develop induction motor torque. the damper bars develop induction generator torque. the damper bars develop synchronous motor torque. negative sequence currents are generated. the damper bars develop induction motor torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which is the arrangement of windings in a core type single phase transformer? Lv on one core limb and hv on the other Half lv inside and half hv outside on each core limb Half hv inside and half lv outside on each core limb Sandwiched lv and hv discs on each core limb Lv on one core limb and hv on the other Half lv inside and half hv outside on each core limb Half hv inside and half lv outside on each core limb Sandwiched lv and hv discs on each core limb ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 5 KVA transformer has a turns ratio of N1/N2 = 10. The impedance of primary winding is 3+j5 ohms while that of secondary winding is 0.5+j0.8 ohms. The impedance of transformer when referred to primary will be 8+j13 ohms 3.5+j5.8 ohms 3.05+j5.08 ohms 53+j85 ohms 8+j13 ohms 3.5+j5.8 ohms 3.05+j5.08 ohms 53+j85 ohms ANSWER DOWNLOAD EXAMIANS APP
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