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Electromagnetism

Quiz by EUGENE MENIANO

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9 questions
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  • Q1
    Which of the following is an example of an electromagnet?
    A table lamp
    A doorbell
    A ladder
    A bicycle
    30s
  • Q2
    What is the SI unit of electric current?
    Ohm
    Ampere
    Volt
    Watt
    30s
  • Q3
    What property of a material determines its ability to conduct electricity?
    Electrical conductivity
    Color
    Density
    Thermal conductivity
    30s
  • Q4
    What causes an electromagnet to become stronger?
    Decreasing the current flowing through the wire
    Increasing the number of coils in the wire
    Increasing the length of the wire
    Using a thinner wire
    30s
  • Q5
    What is the phenomenon of electromagnetic induction?
    The production of an electric current by changing magnetic field
    The production of a magnetic field by an electric current
    The generation of static electricity by friction
    The absorption of electromagnetic radiation by a material
    30s
  • Q6
    Which of the following devices utilizes the principles of electromagnetism?
    A microwave oven
    A blender
    A toaster
    A loudspeaker
    30s
  • Q7
    What is the purpose of a commutator in an electric motor?
    To cool down the motor
    To reverse the direction of current flow in the coil
    To increase the speed of the motor
    To regulate the voltage supplied to the motor
    30s
  • Q8
    What is the relationship between electric current and magnetic field in electromagnetism?
    Electric current and magnetic field are unrelated
    Electric current produces a magnetic field
    Magnetic field produces electric current
    Electric current is unaffected by magnetic field
    30s
  • Q9
    What is the function of a transformer in an electrical circuit?
    To change the voltage of an alternating current
    To store electrical energy
    To protect against electrical overloads
    To convert AC to DC
    30s

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