Electrical Machines A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be zero. about 2 V. about 50 V. 220 V. zero. about 2 V. about 50 V. 220 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will get heated and damaged. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. not start at all. get heated and damaged. rotate in the same direction as before maintenance. rotate in direction opposite to that before maintenance. not start at all. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The flux is maximum in the following part of a DC motor: pole core. under leading pole tip. under trailing pole tip. under the interpole. pole core. under leading pole tip. under trailing pole tip. under the interpole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to withstand twisting strains due to transmission of torque. bending moment due to weight of the armature. any unbalanced magnetic pull on the armature core. All of these twisting strains due to transmission of torque. bending moment due to weight of the armature. any unbalanced magnetic pull on the armature core. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a DC motor at the time of starting is Very high. Normal. Zero. Very low. Very high. Normal. Zero. Very low. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a induction motor helps to increase the starting torque. reduce the magnetizing current. reduce the chance of crawling. reduce the chance of cogging. increase the starting torque. reduce the magnetizing current. reduce the chance of crawling. reduce the chance of cogging. ANSWER DOWNLOAD EXAMIANS APP
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