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Statistics for AC Electrical Motors

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General Stats

  • This quiz has been taken 77 times
  • The average score is 4 of 16

Answer Stats

QuestionAnswer% Correct
What does AC stand for?Alternating Current
98%
In a motor, what is electrical energy usually transformed into?Rotational kinetic energy
54%
At what precise frequency is AC electricity produced at in Australia?50 Hz
52%
What type of material do the rotor and stator have at their cores?A ferromagnetic material
37%
Thin steel laminations reduce the flow of what in this material?Eddy currents
27%
This stationary magnetic field is cylindrical with three field coil pairs. What is rotating inside this cylinder?An electromagnet
25%
In an induction motor, which magnetic field is stationary?The stator
25%
An AC induction motor is similar to a transformer but there is an air gap between the stator and rotor and the secondary coil is allowed to do what?Rotate
23%
In AC induction motors, how is the current formed?A changing magnetic field induces the current
21%
What is the most common shape of an AC motor's rotor?A cylinder
21%
What does the magnetic field from the stator produce on the coil from the rotor?A torque
17%
What is the most common type of AC induction motor?Squirrel-cage Induction motors
15%
What is a common single-phase AC motor?Universal motor
8%
In AC motors, what changes 100 times per second even though the motor rotates in the same direction constantly?The direction of the current
6%
What are motors that operate using two or three phases produced at a power generation plants called?Polyphase motors
2%
For the current to be induced in the rotor bars, the rotor must ____ ______ the magnetic field.Slip behind
0%

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