Related Questions

In which of the following motors the stator and rotor fields rotate simultaneously ?
A D.C. motor
B Reluctance motor
C Universal motor
D Synchronous motor
A 4 pole 50 Hz induction motor is running at 1300 rpm. Find the speed of stator magnetic field with respect to the rotor?
A 200 rpm
B 1500 rpm
C 1300 rpm
D 1700 rpm
The mechanical displacement of the rotor with respect to the stator, in polyphase multipolar synchronous motors running at full load, is of the order of
A zero degree
B two degrees
C five degrees
D ten degrees
The length of a rectangular field F is 3 km greater than the side of a square field M , and the width of field F is 3 km less then the side of field M. If the area of field M is m2 square km, what is the area of field F?
A m2 +6
B 6
C m2 - 6
D m2 +9
What will happen if the relative speed between the rotating flux of stator and rotor of the induction motor is zero?
A The slip of the motor will be 5%
B The rotor will not run
C The rotor will run at very high speed
D The torque produced will be very large
When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor
A remains same as the original value
B decreases to half the original value
C tends to becomes zero
D increases to two times the original value
A farmer has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the smaller field has area K, then the area of the largest field is greater than the area of the smaller field by what amount?
A 4K
B 6K
C 7K
D 8K
A farmer has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the smaller field has area K, then the area of the larger field is greater than the area of the smaller field by what amount ?
A 2K
B 5 K
C 6K
D 7K
The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as
A locked-rotor torque
B synchronous torque
C pull up torque
D reluctance torque
In direct cooled system using hydrogen both stator and rotor conductors are made
A solid
B hollow
C perforated
D any ofthe above

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