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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

03:27

Electromagnetic induction …

07:07

In physics, electromotive …

02:17

The motor in a toy car ope…

06:45

A 120.0 -V motor draws a c…

02:20

A motor has coils with a r…

00:35

A de motor has coils with …

01:01

What is the internal resis…

02:29

What is the back emf of a …

02:01

A de motor is connected to…

02:25

An automobile battery has …

04:28

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04:51

A 120-V, series-wound moto…

03:21

$3.00 \Omega, \quad R_{2}=…

01:31

An automobile starter moto…

03:03

Suppose a motor connected …

03:18

A car battery with a 12 $\…

03:38

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