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Back to 23.6 Back Emf

23.6 Exercise 2

Avg difficulty 2.5

Suppose a motor connected to a 120 V source draws 10.0 A when it first starts. (a) What is its resistance? (b) What current does it draw at its normal operating speed when it develops a 100 V back emf?

OpenStax College Physics 2e, 23.6 Back Emf, exercise 2

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.