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