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