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Oak National Academy
12 questions
Which of the following types of magnet is the magnetic field of an electromagnet most similar to?
A pupil wants to make a strong electromagnet that loses its magnetism completely when switched off. Which of these is a suitable core material? (Note: soft/hard here means magnetically soft/hard.)
Which of the following have a magnetic field around them?
How many newtons are equal to a force of 1 mN?
Which of the following statements is correct? (Note: assume the objects are on Earth.)
Two variables, a and b, are directly proportional. Which of the following statements are correct?
When field lines are drawn to represent a magnetic field, which of the following represents a region in which the field is stronger?
Which of the following increase the strength of the magnetic field around a coil of wire with a fixed diameter?
If all other variables are kept constant, the strength of an electromagnet is always …
An electromagnet’s strength can be investigated using the apparatus shown. When the electromagnet is switched on, there is a positive mass reading on the balance. Which of the following are correct?
On a graph of experimental results, lines can be drawn through each point to show the accuracy of the two measurements used to plot it. What is the name of these lines?
How many of these graphs show a directly proportional relationship?
