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Oak National Academy
12 questions
A material that allows an electric current to flow is called an electrical conductor. A material that does not allow an electric current to flow is called an electrical ___.
The diagram shows a magnetic field between two magnets. The north–seeking and south–seeking poles are shown but the arrows are missing from the field lines. Which way should the arrows point?
A magnetic field with equally spaced field lines is described as ___.
Which of the following statements describes the motor effect?
When using Fleming’s rule to predict the direction of the force, current or magnetic field in the motor effect, which of the following are correct?
The diagram shows a current–carrying wire in a uniform magnetic field. Black arrows show magnetic field direction and a grey arrow shows current direction. In which direction is the force on the wire?
Match each part of a motor with its description.
The diagram shows a simple electric motor from one end, with some of its parts labelled with the letters A to D. Match each letter with the name of the part.
Which of the following explains why the coil of a motor turns when it is connected to a suitable power supply?
A pupil tries to make an electric motor. They join the wire contacts onto the ends of the coil. Why does the motor not work correctly when a battery is connected to the other ends of the contacts?
The diagram shows a motor that is powered by a battery. When the coil is in the vertical position shown, there is no electrical contact between the coil and the battery. What happens next, and why?
A pupil makes a simple electric motor. When they connect it to a suitable power supply, the coil does not spin. Which of the following are possible reasons why?
