Intermediate Motor Principles Quiz
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5 Questions
Question 1 of 5
In a three-phase induction motor, the speed of the rotating magnetic field is primarily determined by:
Synchronous speed (Ns) = (120 * frequency) / number of poles.
Question 2 of 5
What is 'slip' in an induction motor?
Slip represents the speed difference necessary for induction to occur.
Question 3 of 5
How does increasing the air gap in an induction motor affect its performance?
A larger air gap requires more magnetizing current to achieve the same flux, lowering the power factor.
Question 4 of 5
The back EMF in a DC motor is directly proportional to:
Back EMF = k * ? * ?, where ? is the angular speed and ? is the flux.
Question 5 of 5
Which type of DC motor is best suited for applications requiring a nearly constant speed under varying load conditions?
Shunt motors have a field winding connected in parallel, providing better speed regulation than series motors.
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