Electrical Machines Commutator pitches of duplex and simplex lap windings are respectively 4 ang 1 2 and 1 2 and 2 4 and 2 4 ang 1 2 and 1 2 and 2 4 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit in a transformer is prefered with high frequency supply rated transformer voltage direct current rated transformer current high frequency supply rated transformer voltage direct current rated transformer current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cross magnetization effects which of the following? reduction in main field flux both 2 and 3 commutation reduces the terminal voltage reduction in main field flux both 2 and 3 commutation reduces the terminal voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then E ∝ 1/(φf) E ∝ f/φ E ∝ φf E ∝ φ/f E ∝ 1/(φf) E ∝ f/φ E ∝ φf E ∝ φ/f ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to presence of commutator. high resistance of carbon brushes. armature reaction. reactance voltage. presence of commutator. high resistance of carbon brushes. armature reaction. reactance voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor slots are slightly skewed in squirrel cage induction motor to decrease the amount of copper to be used. provide ease of fabrication. increase the strength of rotor bars. reduce the magnetic hum and locking tendency of rotor. decrease the amount of copper to be used. provide ease of fabrication. increase the strength of rotor bars. reduce the magnetic hum and locking tendency of rotor. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS