The starter and exit quiz of the lesson “Current through an electromagnet”, from the unit “Magnets and electromagnets” (Year 9 Science) by Oak National Academy.
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Oak National Academy
12 questions
Which of the following statements about an object made of a magnetic material are correct?
A pupil moves two pieces of metal towards each other and they attract each other by a magnetic force. Which of the following statements are correct?
A pupil moves two pieces of metal towards each other and they repel each other by a magnetic force. Which of the following statements are correct?
An electromagnet has a coil of wire wrapped around an iron core. A current flows in the wire. Which of the following statements explains why the electromagnet behaves like a magnet?
Which of the following would decrease the strength of an electromagnet’s magnetic field?
Which of the following statements are correct?
Match the following key terms to their definition.
Which of the following statements describes a fair test?
A pupil tests how the strength of an electromagnet’s magnetic field is affected by the current in its coil. What is the independent variable in this experiment?
A pupil tests how the strength of an electromagnet’s magnetic field is affected by the current in the coil. Which of the following are control variables in this experiment?
Electromagnets typically have a core made of pure iron inside the coil, known as a soft iron core. What does ‘soft’ mean when describing the iron core?
A pupil wants to make an electromagnet. They wrap bare wire around an iron core and pass a current through the wire. Why does their electromagnet not work?
