College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter30: Atomic Physics
Section: Chapter Questions
Problem 41PE: Repeat Exercise 30.40 for l=3.
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Question
If you try and measure the voltage of a battery with a voltmeter connected in series, you won't get a completely accurate measurement because of the internal resistance of the battery. To see how large this effect is, consider trying to measure the terminal voltage of a 1.585 V alkaline cell having an internal resistance of 49 Ω by placing a 0.85 kΩ voltmeter across its terminals.
To see how close the measured terminal voltage is to the emf, calculate their ratio.
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