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