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