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Electric Motors (ht Only) (GCSE Physics)

The following is a GCSE Physics test covering 'Electric Motors (ht Only)' from the broader topic Magnetism And Electromagnetism. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

In a simple explanation, how does an electric motor convert energy?
What happens to the direction of the force on a current-carrying wire in a magnetic field if you reverse the current direction?
If you reverse the polarity of the magnetic field in a DC motor while keeping the supply the same, what happens?
Which is a possible effect of increasing the supply voltage to a DC motor above its rated value?
In an electric motor, what is the role of the brushes?
A wire carrying a current lies at right angles inside a uniform magnetic field. Which expression gives the magnitude of the force on the wire?
When a motor reaches a steady speed under load, how does the back EMF compare to the supply voltage?
In the equation F = B I L, what does B represent?
Which of the following is Fleming’s left-hand rule used to predict?
Which statement best describes why a soft iron core is used inside the coil of an electromagnet in a motor?
A rectangular coil in a uniform magnetic field experiences a turning effect (torque). Which change will increase the torque produced?