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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) Solar energy
B) Nuclear energy
C) Wind energy
D) Electrical energy
  • 3. What material is traditionally used to create the coils in an electric motor?
A) Steel
B) Copper
C) Aluminum
D) Silver
  • 4. Which physical principle is fundamental to the operation of an electric motor?
A) Kinetic energy
B) Thermodynamics
C) Quantum mechanics
D) Electromagnetism
  • 5. What is a common issue that can occur with electric motors due to prolonged use?
A) Overspeeding
B) Underpowering
C) Overheating
D) Short-circuiting
  • 6. In which industry are electric motors commonly used for automation and control systems?
A) Construction
B) Healthcare
C) Agriculture
D) Manufacturing
  • 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) Regulates motor speed
B) Reverses the direction of current
C) Stores energy
D) Generates electricity
  • 9. What role do capacitors play in some electric motors?
A) Store kinetic energy
B) Regulate voltage
C) Suppress electromagnetic interference
D) Improve power factor
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