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The lesson begins by outlining the work of some of the early experimenters and the sequence which eventually led to the realization of the tremendous advantages of an alternating current system, particularly for large scale and long distance applications. A necessary preliminary to this lesson is the lesson entitled “Basic Direct Current Generators and Motors” to be found elsewhere in this series. Toward the end of this lesson there is a very simple hands-on demonstration of the working principle of an AC motor, which can be assembled in the classroom. The lesson ends with a section in which the students are invited to discuss with the teacher, various ways in which they think the demonstration could be improved.
12 – 18
As a result of this activity, students should develop an understanding of:
At the end of this lesson there is a very simple hands-on demonstration of the working principle of an AC motor, which can be assembled in the classroom. Given that AC motors require a more complex power supply than DC motors, it is not considered reasonable to offer anything more sophisticated at this time.
Curriculum alignment sheet is included in PDF.