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13 QuestionsShow answers
  • Question 1
    30 seconds
    Q. What effect will the south pole of one magnet have on the south pole of another magnet?
    answer choices
    No effect
  • Question 2
    60 seconds
    Q. This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
    answer choices
    Add more coils of wire to the nail.
    Use a smaller battery.
    Reverse the poles of the magnet.
    Remove all the coils and the nail.
  • Question 3
    60 seconds
    Q. What kind of magnet can be turned on and off?
    answer choices
    refridgerator magnet
  • Question 4
    120 seconds
    Q. Surrounding every magnet is a __________  __________.
    answer choices
    magnetic field
    electrical current
    another magnet
    an enemy
  • Question 5
    120 seconds
    Q. In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.
    answer choices
    wire, iron, electric
    electric, wire, iron
    iron, electric, wire
    excited, hair, apple
  • Question 6
    120 seconds
    Q. What is most likely to happen when the switch is closed?
    answer choices
    A magnetic field should be produced
    The nail will rust
    The battery will explode
    The wire will catch on fire
  • Question 7
    60 seconds
    Q. What are the ends of a magnet called?
    answer choices
    East and west poles
    Left and Right ends
    North and South ends
    North and South poles
  • Question 8
    30 seconds
    Q. The attraction or repulsion created by spinning electric charges is called -
    answer choices
    A. electric generator
    B. magnetic force
    C. solenoid
    D. electromagnet
  • Question 9
    30 seconds
    Q. Any material that attracts iron or materials containing iron is a(n) 
    answer choices
    A. electric generator
    B. solenoid
    C. magnet
    D. magnetic force
  • Question 10
    30 seconds
    Q. How do electromagnets differ from regular magnets? 
    answer choices
    A. They  can be turned off and on 
    B. Their polarity can be reversed
    C. Their strength can be changed
    D. All of the above
  • Question 11
    30 seconds
    Q. A compass needle responds to a magnetic field, because the compass needle is a
    answer choices
    A. generator.
    B. motor.   
    C. magnet.
    D. transformer.
  • Question 12
    30 seconds
    Q. Where does a magnetic field occur in relation to an electrified wire? 
    answer choices
    At either end, but not in the middle
    Only the side closest to source
    Around the entire length of wire
    Only the side furthest from source
  • Question 13
    30 seconds
    Q. Why are paper clips attracted to magnets?
    answer choices
    They contain silver.
    They contain aluminum
    They contain tin.
    They contain iron. 
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