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Tutor HuntTest QuestionsPhysics QuestionsYear 10 Physics Questions

 

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

When a motor reaches a steady speed under load, how does the back EMF compare to the supply voltage?
Which material is typically used for the permanent magnets in small DC motors?
A student measures the supply to a small DC motor and finds V = 6.0 V and I = 0.50 A. What is the electrical power input to the motor?
A small DC toy motor is rated 1.5 V. It runs from a 3.0 V supply but overheats quickly. Which is the best explanation?
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?
Which of the following will reverse the rotation direction of a simple DC motor?
What happens to the current drawn by a DC motor when it is stalled (cannot rotate) compared with normal running?
In an electric motor, what is the role of the brushes?
What happens to the direction of the force on a current-carrying wire in a magnetic field if you reverse the current direction?
What is the unit of magnetic flux density B in the SI system?
What advantage do brushless DC motors have over brushed DC motors?