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Thomas Johnston
  • 1. Where was Thomas Johnston born?
A) Scotland
B) Australia
C) India
D) United States
  • 2. What type of energy is typically associated with electric motors?
A) Electrical energy
B) Wind energy
C) Solar energy
D) Nuclear energy
  • 3. What material is traditionally used to create the coils in an electric motor?
A) Silver
B) Aluminum
C) Copper
D) Steel
  • 4. Which physical principle is fundamental to the operation of an electric motor?
A) Thermodynamics
B) Electromagnetism
C) Kinetic energy
D) Quantum mechanics
  • 5. What is a common issue that can occur with electric motors due to prolonged use?
A) Short-circuiting
B) Overheating
C) Overspeeding
D) Underpowering
  • 6. In which industry are electric motors commonly used for automation and control systems?
A) Agriculture
B) Manufacturing
C) Construction
D) Healthcare
  • 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) Regulates motor speed
B) Stores energy
C) Generates electricity
D) Reverses the direction of current
  • 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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