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 47 Ω by placing a 0.75 kΩ voltmeter across its terminals. Randomized Variables R = 0.75 kΩ r = 47 Ω A. What current flows in A? B. Find the terminal voltage in V. C. To see how close the measured terminal voltage is to the emf (Electro Motive Force), calculate their ratio.
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 47 Ω by placing a 0.75 kΩ voltmeter across its terminals. Randomized Variables R = 0.75 kΩ r = 47 Ω A. What current flows in A? B. Find the terminal voltage in V. C. To see how close the measured terminal voltage is to the emf (Electro Motive Force), calculate their ratio.
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter6: Applications Of Newton's Laws
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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 47 Ω by placing a 0.75 kΩ voltmeter across its terminals.
Randomized Variables
R = 0.75 kΩ
r = 47 Ω
A. What current flows in A?
B. Find the terminal voltage in V.
C. To see how close the measured terminal voltage is to the emf (Electro Motive Force), calculate their ratio.
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