Electrical Machines How can the synchronous speed of a 3 - Φ IM be varied? By varying supply voltage. By varying the supply frequency. Both (A) and (B). By varying number of poles. By varying supply voltage. By varying the supply frequency. Both (A) and (B). By varying number of poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called crawling. slip. skewing. cogging. crawling. slip. skewing. cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the armature windings are placed on the rotor because of the necessity for commutation development of torque generation of voltage electromechanical energy conversion commutation development of torque generation of voltage electromechanical energy conversion ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The squirrel cage induction motors are provided with blades in order to balance the rotor dynamically. facilitate cooling of rotor. none of these. eliminate noise. balance the rotor dynamically. facilitate cooling of rotor. none of these. eliminate noise. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an alternator the voltage generated per phase is proportional to flux per pole. number of turns in coil. All of these frequency of waveform. flux per pole. number of turns in coil. All of these frequency of waveform. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, armature reaction refers to what? None of these Effect of armature flux on the load. Effect of armature flux on the main field flux. Effect of field flux on the armature flux. None of these Effect of armature flux on the load. Effect of armature flux on the main field flux. Effect of field flux on the armature flux. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS