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Thomas Johnston - Test
Contributed by: French
  • 1. Where was Thomas Johnston born?
A) Scotland
B) Australia
C) United States
D) India
  • 2. What type of energy is typically associated with electric motors?
A) Nuclear energy
B) Solar energy
C) Wind energy
D) Electrical energy
  • 3. What material is traditionally used to create the coils in an electric motor?
A) Copper
B) Aluminum
C) Silver
D) Steel
  • 4. Which physical principle is fundamental to the operation of an electric motor?
A) Thermodynamics
B) Quantum mechanics
C) Kinetic energy
D) Electromagnetism
  • 5. What is a common issue that can occur with electric motors due to prolonged use?
A) Overheating
B) Underpowering
C) Short-circuiting
D) Overspeeding
  • 6. In which industry are electric motors commonly used for automation and control systems?
A) Healthcare
B) Manufacturing
C) Construction
D) Agriculture
  • 7. What do VFDs (Variable Frequency Drives) do in relation to electric motors?
A) Control motor speed and torque
B) Stabilize electrical current
C) Adjust wire gauge
D) Change motor size
  • 8. What is the role of the commutator in an electric motor?
A) Reverses the direction of current
B) Stores energy
C) Regulates motor speed
D) Generates electricity
  • 9. What role do capacitors play in some electric motors?
A) Store kinetic energy
B) Improve power factor
C) Regulate voltage
D) Suppress electromagnetic interference
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