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Electricity and Magnetism

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  • Which type of magnet is used in cranes?
    Electromagnets
  • ____________ poles of magnet attract each other.
    Unlike
  • _____________ is the sure test for magnetism.
    Repulsion
  • By using soft iron core electromagnetism can be increased. True or false?
    True
  • The electric bell will ring even when the switch is open. True or false?
    False
  • Electromagnets are which type of magnets: permanent or temporary?
    Temporary Magnets
  • What is the purpose of armature in the electric bell circuit?
    To make and break the circuit
  • ___________ beats the gong until current flows in the circuit?
    Striker
  • __________ can be used to remove metallic dust from the wounds.
    Electromagnets
  • State the law of magnetism?
    Like poles repel unlike poles attract
  • Which type of magnet is used in speakers?
    Electromagnets
  • The space around the magnet where its effect can be felt is called _________.
    Magnetic field
  • ____________ poles of magnet attract each other.
    Unlike
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