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. This is the basic principle of which of the following?
How far apart are the phase windings (electrical degrees) in a three-phase induction motor?
How can the magnetic field around an electrical conductor be strengthened?
Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
Test results
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Q: The slip in an induction motor is greater at no load than it is at full load?
A: True
Q: The slip in an induction motor is greater at no load than it is at full load?
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. This is the basic principle of which of the following?
A: Magnetism
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. This is the basic principle of which of the following?
A: Electromagnetism
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. This is the basic principle of which of the following?
A: Induction
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. This is the basic principle of which of the following?
A: Flux density
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: 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: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 1,200 rpm
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 1,800 rpm
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 3,000 rpm
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 3,600 rpm
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: 1,800 rpm
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: 3,000 rpm
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: 3,500 rpm.
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: None of the above