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Electrical Machines
3rd harmonics are eliminated in induction motor by using
zig - zag connection.
delta connection.
star connection.
V connection.
zig - zag connection.
delta connection.
star connection.
V connection.
Answer
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Related Question
Electrical Machines
The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is
1, 4
2, 4
1, 3
2, 3
1, 4
2, 4
1, 3
2, 3
Answer
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Electrical Machines
In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve
reduced size.
low starting torque.
quick acceleration.
high efficiency.
reduced size.
low starting torque.
quick acceleration.
high efficiency.
Answer
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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?
2000W
1920W
1820W
1450W
2000W
1920W
1820W
1450W
Answer
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Electrical Machines
Induction motors provided with open slots have
less breakdown torque.
higher efficiency.
more breakdown torque.
leading power factor.
less breakdown torque.
higher efficiency.
more breakdown torque.
leading power factor.
Answer
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Electrical Machines
A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is
25%
2%
4%
5%
25%
2%
4%
5%
Answer
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