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