14 February2014. Motoring. Learning Objective To investigate electric motors. Some. Explain why practical motors have a radial field produced by curved pole pieces. (A/B ). Most. describe how this is achieved using a split ring commutator . (B). All.
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To investigateelectric motors.
How do the robots work?
What devices are needed to make them so agile and effective?
The split ring commutator has one side that is always positive and one side that is always negative. The current through the coil changes direction every half rotation so that it rotates in the same direction.
Making a model motor – class practical
Follow the instructions on the worksheet and answer the questions.
Worksheets on electric motors
Complete all questions.
Why don’t we see more electric cars on the roads?
In small groups, come up with a list of advantages and disadvantages of electric cars.