Just answer
2007-05-15 05:10:14 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Well, a typical bulb produces 5-15 watts of power.
Two D batteries produces 3 Volts (1.5 each).
2007-05-15 05:13:24 · answer #1 · answered by jcann17 5 · 0⤊ 1⤋
Flashlights don't produce energy. They consume it. They take chemical energy from batteries in the form of electricity. They send that to small light bulbs which are heated by the current to get hot enough to emit light.
If you have two 1.5V batteries in series you have 3 volts. A typical flashlight bulb is about 50 mA (.050 A). The wattage is volts times amps so that is 3 x .050 which is about 1/7th of a watt. Flashlights that use LEDs as their light source take less power for the same light intensity. The bigger flashlights with 4 or 6 cells might use close to half a watt of energy.
2007-05-15 05:20:42 · answer #2 · answered by Rich Z 7 · 1⤊ 0⤋
None. A flashlight does not produce energy.
2007-05-15 05:14:11 · answer #3 · answered by Automation Wizard 6 · 1⤊ 1⤋
" a 'C' cell has 4 Ah, a 'D' cell is about 8Ah," since each of these cells is 1.5 volts, they will produce 6 and 12 Watt Hours respectively - 6 watt hours is what a 60 watt household bulb uses in 6 minutes (1/10 hour).
http://www.ebikes.ca/batteries.shtml
2007-05-15 05:22:52 · answer #4 · answered by Mike1942f 7 · 0⤊ 0⤋