Electromagnetism Basics
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Questions and Answers

What is the purpose of the iron core in an electromagnet?

  • To prevent the flow of electric current
  • To increase the resistance in the wires
  • To concentrate the magnetic flux produced by the current outside the wires (correct)
  • To make the electromagnet permanent

    • Which part of an electromagnet is responsible for serving as the passage for electric current?

  • Power source
  • Insulated wire (correct)
  • Iron core
  • Wires need to be insulated

    • Why does an electromagnet stop exhibiting magnetism when the electric current is cut off?

  • The property of magnetism relies on the flow of electric current (correct)
  • The wire becomes permanently magnetized
  • The power source deactivates the magnetic field
  • The iron core loses its conductivity

    • Why does insulated wire play a crucial role in an electromagnet?

    <p>To prevent current leakage and protect against environmental threats</p> Signup and view all the answers

    What determines the power of an electromagnet?

    <p>The number of turns of wire</p> Signup and view all the answers

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