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Higher Study | Electrical Machines | DC Motor

Which of the following application requires high starting torque?
Which part of a motor needs maximum attention for maintenance?
The counter EMF of a DC motor
DC Series motors are considered most suitable for the application in:
A D.C shunt motor is found suitable to drive fans because they require:
Good commutation means
In electric machines, copper losses occur
In a DC motor, constant torque is produced due to
Hopkinson’s test for D.C. motors is conducted of:
Consider the following statements: In the above figure, the curves pertain to the DC motor A. Speed vs Armature current characteristic of a DC shunt motor B. Torque vs Armature current characteristic of a DC shunt motor C. Speed vs Armature current characteristic of a DC series motor D. Torque vs Armature current characteristic of a DC series motor
When is a ceramic magnet used as a permanent magnet in a permanent magnet DC motor?
For constant load and supply voltage, two DC series motors will develop maximum torque when both are connected in
When a DC series motor runs on no load:
When a DC series motor is connected to AC supply, the power factor will be low because of:
Identify the correct statement for a generator when compared to a motor?
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