The magnetic field of a bar magnet
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Waxaan sawiri karaa goobta magnetic-ka ee ku wareegsan magnet-ka birta ah.
Introduction
In this lesson: I can plot a magnetic field around a bar magnet. The needle of a plotting compass lines up with the magnetic field of a magnet. A magnetic field line can be followed from the north–seeking pole to the south–seeking pole of a magnet.
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Quizzes
1. Which of the following statements about magnets is correct?
- they have a single pole
- Correct answer:they have two poles
- they have three poles
- they can have any even number of poles
2. Which of the following statements about a south–seeking pole are correct?
- it will point to Earth's north pole
- Correct answer:it will point to Earth's south pole
- Correct answer:it will attract to the N–pole of a magnet
- it will attract to the S–pole of a magnet
3. If a magnet is broken into two pieces, how many poles will there be in total?
- 1 pole
- 2 poles
- 3 poles
- Correct answer:4 poles
4. Which of the following statements about the magnetic force is correct?
- Correct answer:it is a non–contact force
- it is a contact force
- it is a charge force
- it is an electrostatic force
5. What does the part of a bar magnet, shown in the image, do?
- it seeks north
- Correct answer:it seeks south
- it does not seek north or south
- it seeks both north and south
6. Which of the following statements is correct?
- a magnet will attract and repel an iron nail
- Correct answer:a magnet will attract and repel another magnet
- a magnet will only attract another magnet
- a magnet will only repel an iron nail
1. Which of the following materials can be used to show the magnetic field of a magnet?
- sawdust
- lycopodium powder
- Correct answer:iron filings
- water spray
2. How are iron filings affected by a magnet?
- Correct answer:they mainly collect at the poles
- they are evenly distributed around the magnet
- they collect in the centre of the magnet
- they are repelled away from the magnet
3. What causes a compass needle to point towards Earth's north pole?
- the Moon's magnetic field
- Correct answer:Earth's magnetic field
- the charge inside Earth
- the charge in the atmosphere
4. Which of the following correctly describes the direction in which the needle of a plotting compass will point?
- Correct answer:away from the N–pole of a magnet
- away from the S–pole of a magnet
- towards the N–pole of a magnet
- Correct answer:towards the S-pole of a magnet
5. In which direction do magnetic field lines point?
- from the S–pole of a magnet to the N–pole of a magnet
- from the S–pole of a magnet to the S–pole of a magnet
- Correct answer:from the N–pole of a magnet to the S–pole of a magnet
- from the N–pole of a magnet to the N–pole of a magnet
6. Which of the following statements about magnetic field lines are correct?
- Correct answer:fewer lines in an area indicate a weaker magnetic field
- they can be seen with an infrared camera
- Correct answer:they are continuous
- they come out of the centre of a bar magnet
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 6 questions
- Lesson videoLearn
- Exit quizCheck · 6 questions