The Physics Factbook™
Edited by Glenn Elert -- Written by his students
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|Bibliographic Entry||Result |
|Cutnell, John D. Third Edition Physics John Wiley & Sonsinc 1995||"A new 'D' battery has an emf of 1.5 V when a wire of negligible resistance is connected between the terminals of the battery a current of a 28 A is produced"||42 W|
|Duracell - Our Company||0.1–1.0 W|
|"D"Battery -1.5 V & 13 A||19.5 W|
|Technical Marketing Datasheets||"D"1.5 V - 13 A||19.5 W|
I was on the D train on the way to school, in the middle ofmy favorite song "Big Pimpin" and suddenly the batteriesin my Discman died! I asked my friend next to me what was wrongwith my batteries. He looked at me, with a sly self-aware smileand said:
Well, 1.5 V batteries are actually quite interesting. Thanks to Benjamin Franklin and his crazy kite experiment, we now know about the wonders of electricity. Alessandro Volta constructed the first device known to produce to continuous electricity. I don't really know the rest of the battery history, but I do know that the power of a 1.5 V battery depends on its current and service time.
The alkaline battery is used in most Duracell and Energizerbatteries. The electrodes (terminal through which electric currentpasses between metallic and non-metallic parts of an electricalcircuit) are zinc and manganese oxide, with an alkaline electrolyte(electrical current in which current is carried by charged particlesrather than by free electrons).
The power of a 1.5 V battery varies with the number ofhours its in service. According to the chart above, the powerdischarge for a 1.5 V "D"battery at approximately210 hours is 0.1 Watts (W). At about 60 hours the powerdischarge is 0.25 W. At about 40 hours the power dischargeis 0.5 W. At about 10 hours the power discharge is 1.0 W.More power is possible when the battery is in service for lesstime.
According to the problem from the textbook, the power is foundto be 1.5 V · 28 A = 42 W.This example further shows that power is dependent not only onservice time, but also on the current.
Etan Marciano -- 2001
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