Practice Like Poles Repel And Opposite Poles Attract (1.3.2.1)

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6 sample questions

Question 1.
What are the two types of poles in a magnet?
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Think of the direction in which magnets attract or repel each other.
Question 2.
What happens when like poles of a magnet are brought close?
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Remember, opposites attract!
3Question 3.
What happens when two north poles are brought together?
- True (Attract)
- False (Repel)
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Think of magnets and their behaviors!
4Question 4.
Do ferromagnetic materials retain magnetism after an external field is removed?
- Yes
- No
- Only when heated
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Consider the behavior of iron!
Question 5.
If you have a rectangular piece of iron and expose it to a strong magnetic field, describe what happens if the magnetic field is turned off.
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Consider the classification of materials.
Question 6.
Consider a wire carrying current and a magnetic field at right angles to each other. Calculate the force experienced by a 2m wire carrying 5A of current in a magnetic field of strength 0.3T.
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The angle plays a key role; consider the optimal angle for maximum force.

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