問 1
1 点Which statement correctly describes the direction of magnetic field lines outside a bar magnet?
Pearson Edexcel IGCSE · Physics
Magnetism：練習問題
その場で採点される選択問題 5 問と、解説つきの記述問題 2 問。すべて「Magnetism」からの出題です。
7 問14 点無料・登録不要
問 2
1 点A student wants to build a simple electromagnet. Which material should they use for the core to ensure the electromagnet can be switched on and off effectively?
問 3
1 点A piece of unmagnetised soft iron is brought near the South pole of a strong permanent magnet. Which statement correctly describes the induced magnetism in the soft iron?
問 4
1 点What occurs when the North pole of a permanent bar magnet is brought close to the North pole of another permanent bar magnet?
問 5
1 点The diagram shows the magnetic field lines around a bar magnet. At which labeled point is the magnetic field strength the greatest?
問 6
4 点Describe the experimental procedure for using a plotting compass to map the magnetic field pattern around a single bar magnet.
まず自分で答えを書いてから、解説と照らし合わせましょう。
問 7
5 点A student is investigating the properties of different magnetic materials and the fields they produce.
(a) Explain why steel is classified as a magnetically hard material and why this makes it suitable for use as a permanent magnet.
(b) Two bar magnets are placed on a desk. Describe the force observed when the North pole of one magnet is brought close to the North pole of the second magnet.
(c) Describe a practical procedure using iron filings to reveal the shape of the magnetic field pattern around a bar magnet.
(d) State one safety precaution the student should take when performing the experiment with iron filings.
まず自分で答えを書いてから、解説と照らし合わせましょう。
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