2007-07-17 04:26:30 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
US$0.50 / W-hr for an AA-cells, and approximately US$0.13 / W-hr for D-cells
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2007-07-17 07:01:21 · answer #1 · answered by tlbs101 7 · 0⤊ 0⤋
Typical AA cells have a rating of 1.5 V and about 2000 mAh (milliamp hours). They cost a dollar or two (stop by a store and check a label to get specific values if you want). From there, it is just a question of converting calculating total energy from the current and voltage and to the units you want.
For example, electricity for houses is typically ~$0.10/kWh (kilowatt hour). A quick estimate suggest that the battery would be more like $1000/kWh, or about 10,000 times as expensive as energy from the electric company!
2007-07-17 05:35:14 · answer #2 · answered by Tim F 2 · 0⤊ 0⤋
the industry standards NEMA committee established standards for the cells you mention, and also "F" which is rarely seen anymore. There are no A and B designations mostly because these standards were set in the 1920s in the era of tube radios. in a battery operated tube radio the "A" battery heated the filament and the "B" battery was connected to the plate (anode). these weren't a particular voltage or size but were a functional designation. B batteries were usually 22 volts to 135 volts, with 45 and 90 being the most popular. Occassionally you will also see a "C" battery in a tube specification which is the grid bias supply. There is no actual C battery, the bias was always supplied by either a "grid leak" or a resistor in series with the cathode that drew from the B battery.
2016-05-20 02:33:30 · answer #3 · answered by ? 3 · 0⤊ 0⤋
What are you asking? You need more information in your question. What units for cost? Are you asking how much power is being transfered? If so, You must know either current drawn or the resistance of your load.
2007-07-17 05:30:10 · answer #4 · answered by apostlepaul 2 · 0⤊ 0⤋