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ELECTRICAL MACHINES

Electrical Machines
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss?

 100W
 80W
 60W
 40W

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 3-phase, 50Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor output power?

 1920W
 1820W
 1450W
 2000W

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency?

 94%
 92%
 96%
 95%

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Torque developed in the rotor is

 inversely proportional to slip
 not dependent on the slip
 directly proportional to slip
 either of these

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A smaller air gap in a induction motor helps to

 reduce the chance of cogging.
 reduce the magnetizing current.
 increase the starting torque.
 reduce the chance of crawling.

ANSWER DOWNLOAD EXAMIANS APP
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