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The motor in a toy car is powered by four batteries in series, which produce a total emf of 6.00 V. The motor draws 3.00 $\mathrm{A}$ and develops a 4.50 $\mathrm{V}$ back emf at normal speed. Each battery has a 0.100$\Omega$ internal resistance. What is the resistance of the motor?
12 $\mathrm{A}$
01:35
Charles M.
Physics 102 Electricity and Magnetism
Chapter 23
Electromagnetic Induction, AC Circuits, and Electrical Technologies
Electromagnetic Induction
Simon Fraser University
Hope College
University of Winnipeg
McMaster University
Lectures
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