Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 400 A. 440 A. 44 A. 40 A. 400 A. 440 A. 44 A. 40 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starter is not used with large DC motor for starting, it will damage the armature and commutator. draw a starting current many times its rated full load current. provide execessive voltage drop in line. all of above. damage the armature and commutator. draw a starting current many times its rated full load current. provide execessive voltage drop in line. all of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, which component plays the vital role to produce the direct current? Brush. Armature. Commutator. Yoke. Brush. Armature. Commutator. Yoke. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator pitches of duplex and simplex lap windings are respectively 2 and 1 4 ang 1 4 and 2 2 and 2 2 and 1 4 ang 1 4 and 2 2 and 2 ANSWER DOWNLOAD EXAMIANS APP
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 25% 5% 2% 4% 25% 5% 2% 4% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a single phase capacitor start induction motor which of the following is valid? Rotation can be changed by interchanging supply terminals. Rotation can be changed by reversing main winding terminals. Direction of rotation cannot be changed. None of these. Rotation can be changed by interchanging supply terminals. Rotation can be changed by reversing main winding terminals. Direction of rotation cannot be changed. None of these. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS