Electrical Machines In a synchronous generator with constant steam input supplies power to an infinite bus at a lagging power factor. If the excitation is increased power angle decrease and power factor increase power angle increase and power factor decrease both power angle and power factor decrease both power angle and power factor increase power angle decrease and power factor increase power angle increase and power factor decrease both power angle and power factor decrease both power angle and power factor increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is 6 ohms. 2.2 ohms. 1.9 ohms. 5.7 ohms. 6 ohms. 2.2 ohms. 1.9 ohms. 5.7 ohms. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer which of the following losses are zero? Copper loss Iron loss Rotational loss All of these Copper loss Iron loss Rotational loss All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole, 50 Hz induction motor 4 % slip, calculate frequency of the rotor emf? 50 Hz. 3 Hz. 2 Hz. 10 Hz. 50 Hz. 3 Hz. 2 Hz. 10 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor electromagnetic torque developed is Inversely proportional to the armature current. Proportional to the armature current. Proportional to the square of armature current. None of above. Inversely proportional to the armature current. Proportional to the armature current. Proportional to the square of armature current. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when the generator runs on full load. there is no load on the generator. the generator runs on designed speed. the generator runs on overload. the generator runs on full load. there is no load on the generator. the generator runs on designed speed. the generator runs on overload. ANSWER DOWNLOAD EXAMIANS APP
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