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Lesson: Attraction and Repulsion between Permanent Magnets

In this lesson, we will learn how to describe the forces of attraction and repulsion between permanent magnets, and what materials permanent magnets can be made out of.

Sample Question Videos

02:49
01:19

Worksheet • 9 Questions • 2 Videos

Q1:

Like poles . Unlike poles .

  • Arepel, attract
  • Brepel, repel
  • Cattract, attract
  • Dattract, repel

Q2:

A bar magnet is brought near to a similarly sized bar of unmagnetized iron. The bar magnet induces a magnetic polarity in the iron. Which end of the bar of iron, 𝑋 or π‘Œ , will be the north pole of the induced magnet?

  • A 𝑋
  • B π‘Œ

Q3:

A bar magnet is hung from a thread that is attached to a stand. The magnet can pivot freely.

What will happen if the north pole of a second bar magnet is brought near to the north pole of the bar magnet that is hanging from the thread?

  • AThe north pole of the hanging bar magnet will be repelled by the north pole of the second magnet.
  • BBoth poles of the hanging bar magnet will be attracted to the north pole of the second magnet.
  • CThe north pole of the hanging bar magnet will be attracted to the north pole of the second magnet.
  • DNothing will happen.
  • EThe south pole of the hanging bar magnet will be repelled by the north pole of the second magnet.

What will happen if the north pole of the second bar magnet is brought near to the south pole of the bar magnet that is hanging from the thread?

  • AThe south pole of the hanging bar magnet will be attracted to the north pole of the second magnet.
  • BBoth poles of the hanging bar magnet will be repelled by the south pole of the second magnet.
  • CThe south pole of the hanging bar magnet will be repelled by the north pole of the second magnet.
  • DNothing will happen.
  • EThe north pole of the hanging bar magnet will be repelled by the south pole of the second bar magnet.

Q4:

Two bar magnets are placed on a flat table in the arrangement shown in the diagram. Will the magnets be attracted to each other or repelled by each other?

  • AThey will be repelled by each other.
  • BThey will be attracted to each other.

Q5:

Which of the following pure elements cannot be used to make a permanent magnet?

  • AMagnesium
  • BCobalt
  • CIron
  • DNickel
  • ESteel

Q6:

What two words describe the two poles of a magnet?

  • ANorth and south
  • BRed and blue
  • CEast and west
  • DUp and down
  • EPositive and negative

Q7:

Iron and steel can be used to make permanent magnets. Which two other of the following pure elements can be used to make permanent magnets?

  1. Sodium
  2. Cobalt
  3. Silicon
  4. Sulfur
  5. Calcium
  6. Nickel
  • Ab and f
  • Bd and b
  • Ca and f
  • De and c
  • Eb and c

Q8:

Two bar magnets are placed on a flat table in the arrangement shown in the diagram. Will the magnets be attracted to each other or repelled by each other?

  • AThey will be attracted to each other.
  • BThey will be repelled by each other.

Q9:

Charlotte has a bar magnet which has no markings on it showing which end is its north pole and which is its south pole. She uses a second bar magnet, which does have markings on it, to find out which end of the first bar magnet has which polarity, as shown in the diagram.

When Charlotte brings the north pole of the second bar magnet to the 𝑋 end of the first bar magnet, the first bar magnet is attracted to the second. When she brings the north pole of the second bar magnet to the π‘Œ end of the first bar magnet, the first bar magnet is repelled by the second.

Which end of the 𝑋 π‘Œ bar magnet is the north pole?

  • A 𝑋
  • B π‘Œ
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