Electrical Machines Silicon content in steel lamination is kept within 5% as it increases hysteresis loss. makes the material brittle. Increases cost. All of these increases hysteresis loss. makes the material brittle. Increases cost. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a specific open-circuit voltage of a DC generator, the short-circuit electric current will be maximum when it is cumulatively compounded. differentially compounded. separately excited. shunt connected. cumulatively compounded. differentially compounded. separately excited. shunt connected. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC motors, under trailing pole tips, flux density will_______ ? decrease None of these either increase or decrease increase decrease None of these either increase or decrease increase 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 RBY BRY BYR All of these RBY BRY ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole DC generator runs at 1500 rpm. The frequency of current in the armature winding is: 25 Hz. 100 Hz. Zero Hz. 50 Hz. 25 Hz. 100 Hz. Zero Hz. 50 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding dc machines : 1. possible resistance of shunt-field winding is 1 Ω 2. possible resistance of series-field winding is 1 Ω 3. electrographite brushes are used for 230 V, 10 A machines 4. Copper-graphite brushes are used for 230 V, 10 A machines 5. Possible armature-circuit resistance is 1 Ω From these, the correct statements are 2, 3 , 5 1, 4 1, 3, 5 2, 4 ,5 2, 3 , 5 1, 4 1, 3, 5 2, 4 ,5 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS