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Thomas Johnston
  • 1. Where was Thomas Johnston born?
A) Australia
B) United States
C) Scotland
D) India
  • 2. What type of energy is typically associated with electric motors?
A) Wind energy
B) Electrical energy
C) Nuclear 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. Which physical principle is fundamental to the operation of an electric motor?
A) Thermodynamics
B) Kinetic energy
C) Electromagnetism
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) Underpowering
D) Overspeeding
  • 6. In which industry are electric motors commonly used for automation and control systems?
A) Construction
B) Healthcare
C) Manufacturing
D) Agriculture
  • 7. What do VFDs (Variable Frequency Drives) do in relation to electric motors?
A) Change motor size
B) Stabilize electrical current
C) Control motor speed and torque
D) Adjust wire gauge
  • 8. What is the role of the commutator in an electric motor?
A) Regulates motor speed
B) Generates electricity
C) Reverses the direction of current
D) Stores energy
  • 9. What role do capacitors play in some electric motors?
A) Suppress electromagnetic interference
B) Regulate voltage
C) Improve power factor
D) Store kinetic energy
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