3. (II) What is the internal resistance of a 12.0-V car

Chapter 19, Problem 3

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QUESTION:

3. (II) What is the internal resistance of a 12.0-V car battery whose terminal voltage drops to 8.4 V when the starter draws 75 A? What is the resistance of the starter?

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QUESTION:

3. (II) What is the internal resistance of a 12.0-V car battery whose terminal voltage drops to 8.4 V when the starter draws 75 A? What is the resistance of the starter?

ANSWER:

Step 1 of 2

For the circuit diagram, see figure (19-2). The internal resistance  can be found from the equation (19-1):

Substitute the givens

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