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Electric motors

Quiz by Denise Butigan

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15 questions
Show answers
  • Q1
    Which component is essential for generating the magnetic field in an electric motor?
    Resistor
    Electromagnet
    Capacitor
    Transistor
    30s
  • Q2
    What happens when you increase the electric current in an electromagnet?
    The magnet becomes weaker
    The electromagnet turns off
    The wire melts
    The magnetic field strength increases
    30s
  • Q3
    How does the number of coils affect the strength of an electromagnet?
    More coils increase the strength
    The number of coils has no effect
    More coils decrease the strength
    Only one coil is needed
    30s
  • Q4
    In what way can an electromagnet be made stronger besides adding more coils?
    Using thicker wire
    Making it out of plastic
    Decreasing the coil length
    Increasing the electric current
    30s
  • Q5
    What is the main advantage of using an electromagnet over a permanent magnet?
    It can be turned on and off
    It is lighter
    It has a fixed shape
    It is always stronger
    30s
  • Q6
    What type of electricity is typically used to power electromagnets in most applications?
    Alternating current (AC)
    Direct current (DC)
    Static electricity
    Solar power
    30s
  • Q7
    What is the primary material used to enhance the magnetic field in an electromagnet?
    Copper
    Iron
    Plastic
    Aluminum
    30s
  • Q8
    What type of energy does a generator produce?
    Electrical energy
    Mechanical energy
    Thermal energy
    Chemical energy
    30s
  • Q9
    What is the purpose of a generator?
    To increase electrical voltage
    To cool electrical circuits
    To store electrical energy
    To convert mechanical energy into electrical energy
    30s
  • Q10
    In a generator, what happens when the coil rotates within a magnetic field?
    Heat is produced
    Sound is created
    Electricity is generated
    Light is emitted
    30s
  • Q11
    What type of transformer is used to increase voltage?
    Isolation transformer
    Auto transformer
    Step-down transformer
    Step-up transformer
    30s
  • Q12
    What is the main purpose of a transformer in electrical systems?
    To convert AC to DC
    To change the voltage level
    To increase current
    To store energy
    30s
  • Q13
    What happens to the current when the voltage is stepped up in a transformer?
    The current becomes zero
    The current stays the same
    The current decreases
    The current increases
    30s
  • Q14
    What physical principle does a transformer operate on?
    Thermal conduction
    Electromagnetic induction
    Magnetic repulsion
    Electrolysis
    30s
  • Q15
    What is the function of the primary winding in a transformer?
    To convert AC to DC
    To transmit output current
    To receive the input voltage
    To generate magnetic fields
    30s

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