University Physics with Modern Physics (14th Edition)

by Young, Hugh D.; Freedman, Roger A.

Published by Pearson

ISBN 10: 0321973615

ISBN 13: 978-0-32197-361-0

Chapter 25 - Current, Resistance, and Electromotive Force - Problems - Discussion Questions - Page 840: Q25.5

Answer

See explanation.

Work Step by Step

The battery must have some internal resistance. The terminal voltage, $V_{ab}$, will be slightly less than the emf $\epsilon$ because of the voltage drop across the internal resistance. See equation 25.15.

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