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Electrical Machines
Considering a galvanometer is connected to the rotor of a 3 - Φ, 4 pole, 50 Hz IM and is making 130 oscillations in a minute, then calculate the rotor speed?
1450.
1435.
1440.
1500.
1450.
1435.
1440.
1500.
Answer
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Related Question
Electrical Machines
The type of DC generator used for arc welding purpose is a
shunt generator
cumulatively compounded generator
series generator
differentially compounded generator
shunt generator
cumulatively compounded generator
series generator
differentially compounded generator
Answer
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Electrical Machines
Armature flux is.............with respect to main field flux or main field poles?
rotates same direction
None of these
rotates opposite direction
stationary
rotates same direction
None of these
rotates opposite direction
stationary
Answer
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Electrical Machines
A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed?
Zero
15.28 Nm
16.55 Nm
15.6 Nm
Zero
15.28 Nm
16.55 Nm
15.6 Nm
Answer
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Electrical Machines
Which of the following motor is not suitable for frequent starting and stopping?
Capacitor run motor
Capacitor split phase motor
Resistance split phase motor
All of these
Capacitor run motor
Capacitor split phase motor
Resistance split phase motor
All of these
Answer
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Electrical Machines
For larger units high torque it is preferred to use
DC shunt motor.
Slip induction motor.
Partial motor.
Universal motor.
DC shunt motor.
Slip induction motor.
Partial motor.
Universal motor.
Answer
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