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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman
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The potential difference between the two terminals of an

Chapter 23, Problem 8DQ

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QUESTION:

The potential difference between the two terminals of an AA battery (used in flashlights and portable stereos) is 1.5 V. If two AA batteries are placed end to end with the positive terminal of one battery touching the negative terminal of the other, what is the potential difference between the terminals at the exposed ends of the combination? What if the two positive terminals are touching each other? Explain your reasoning.

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QUESTION:

The potential difference between the two terminals of an AA battery (used in flashlights and portable stereos) is 1.5 V. If two AA batteries are placed end to end with the positive terminal of one battery touching the negative terminal of the other, what is the potential difference between the terminals at the exposed ends of the combination? What if the two positive terminals are touching each other? Explain your reasoning.

ANSWER:

Introduction We have to calculate the potential difference between the exposed terminal when two batteries are connected as stated in the problem. Step 1 (a) If positive terminal of one battery is touching the negative terminal of the other battery, then the direction of the potential difference in both the battery is same. Hence the potential difference will add up. So the total potential difference will be 3.0 V.

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