How can the magnetic field around an electrical conductor be strengthened?
Which of the following electrical devices is most commonly used to start a single-phase motor?
How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
You can typically increase motor efficiency by 5% by using a permanent magnet synchronous motor instead of an induction motor?
Test results
Congratulations. You have passed the test and completed the 106L - Electromagnetic Motors
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Q: How can the magnetic field around an electrical conductor be strengthened?
A: Reduce the voltage
Q: How can the magnetic field around an electrical conductor be strengthened?
A: Wind it into a coil around an iron core
Q: How can the magnetic field around an electrical conductor be strengthened?
A: Add more poles
Q: How can the magnetic field around an electrical conductor be strengthened?
A: None of the above
Q: An induction motor will operate at synchronous speed at full load?
A: True
Q: An induction motor will operate at synchronous speed at full load?
A: False
Q: Which of the following electrical devices is most commonly used to start a single-phase motor?
A: Resistor
Q: Which of the following electrical devices is most commonly used to start a single-phase motor?
A: Switch
Q: Which of the following electrical devices is most commonly used to start a single-phase motor?
A: Thermostat
Q: Which of the following electrical devices is most commonly used to start a single-phase motor?
A: Capacitor
Q: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
A: 45 degrees
Q: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
A: 90 degrees
Q: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
A: 180 degrees
Q: How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
A: 120 degrees
Q: You can typically increase motor efficiency by 5% by using a permanent magnet synchronous motor instead of an induction motor?
A: True
Q: You can typically increase motor efficiency by 5% by using a permanent magnet synchronous motor instead of an induction motor?
A: False
Q: When power is applied to the stator, an expanding magnetic field is created that cuts across the rotor conductor bars and induces current in the rotor.
A: True
Q: When power is applied to the stator, an expanding magnetic field is created that cuts across the rotor conductor bars and induces current in the rotor.
A: False