Electrical Machines For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio 57.7% 50% 33.3% 66.3% 57.7% 50% 33.3% 66.3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole DC generator runs at 1500 rpm. The frequency of current in the armature winding is: 100 Hz. 25 Hz. 50 Hz. Zero Hz. 100 Hz. 25 Hz. 50 Hz. Zero Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sequence of induction motor is RYB, then the direction of induction motor can be changed by which of the following sequence? BYR All of these BRY RBY BYR All of these BRY RBY ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for hoisting and lowering which type of motor is preferred? DC series motor. AC slip ring motor. Single phase induction motor. Synchronous motor. DC series motor. AC slip ring motor. Single phase induction motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The flux is maximum in the following part of a DC motor: under leading pole tip. pole core. under trailing pole tip. under the interpole. under leading pole tip. pole core. under trailing pole tip. under the interpole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When maximum flux density is constant, the eddy current losses are proportional to V2 V f2 f V2 V f2 f ANSWER DOWNLOAD EXAMIANS APP
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