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Electric motors and Generators

Quiz by Edgar Daquioag

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28 questions
Show answers
  • Q1
    What is the purpose of the commutator in an electric motor?
    To generate electrical energy
    To change the direction of the current flowing in the armature
    To provide a mechanical connection between the rotor and stator
    To regulate the speed of the motor
    30s
  • Q2
    What is the function of the stator in an electric motor?
    To store electrical energy temporarily
    To convert electrical energy into mechanical energy
    To change the direction of the current flowing in the armature
    To create a magnetic field that interacts with the rotor
    30s
  • Q3
    What is the most common type of electric motor?
    Hybrid motor
    Stepper motor
    DC motor
    AC motor
    30s
  • Q4
    What determines the speed of an electric motor?
    The frequency of the power supply
    The number of poles in the stator
    The size of the motor
    The voltage of the power supply
    30s
  • Q5
    What is the purpose of the brushes in a DC motor?
    To provide a mechanical connection between the rotor and stator
    To regulate the speed of the motor
    To deliver electrical power to the armature
    To create a magnetic field in the stator
    30s
  • Q6
    What is the difference between a synchronous and an asynchronous motor?
    A synchronous motor operates only on DC, while an asynchronous motor operates on AC
    A synchronous motor operates at a constant speed, while an asynchronous motor has a speed that varies with the load
    A synchronous motor is more efficient than an asynchronous motor
    A synchronous motor does not have a rotor, while an asynchronous motor does
    30s
  • Q7
    Which type of energy does an electric motor convert into mechanical energy?
    Sound energy
    Electrical energy
    Chemical energy
    Light energy
    30s
  • Q8
    What is the rotating component of an electric generator called?
    Converter
    Rotor
    Transistor
    Stator
    30s
  • Q9
    What is the purpose of the commutator in an electric motor?
    To convert AC power to DC power
    To create the magnetic field in the stator
    To regulate the speed of the motor
    To reverse the direction of current flow in the armature
    30s
  • Q10
    What is the purpose of the magnetic field in an electric motor?
    To control the speed of the motor
    To provide force for the rotation of the armature
    To generate heat
    To transfer electricity from the power source to the armature
    30s
  • Q11
    Which device can be driven by an electric motor?
    cooking pan
    bicycle
    toilet brush
    umbrella
    30s
  • Q12
    What is commonly used to power an electric generator to produce electricity?
    A water wheel
    A solar panel
    A wind turbine
    A fuel source such as gasoline or diesel
    30s
  • Q13
    What happens to the electrical current in an electric motor if the magnetic field is weakened?
    The current increases
    The motor stops working
    The current decreases
    The current remains the same
    30s
  • Q14
    What would be the impact on generator efficiency if the rotor's speed decreases?
    Efficiency remains constant
    Decreased efficiency
    No impact on efficiency
    Increased efficiency
    30s
  • Q15
    What is the main difference between an electric motor and an electric generator?
    Both convert electrical energy into mechanical energy.
    An electric motor is used to convert electrical energy into mechanical energy, while an electric generator converts mechanical energy into electrical energy.
    Both convert mechanical energy into electrical energy.
    An electric motor converts mechanical energy into electrical energy, while an electric generator converts electrical energy into mechanical energy.
    30s

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