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Re: Electronics 101 Question .....
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Posted by Gary Schafer on October 25, 2006 at 18:19:25 from (63.135.132.238):
In Reply to: Electronics 101 Question ..... posted by MMB on October 25, 2006 at 15:35:07:
Out of all those replies not one person got the right answer. A few were close. Most all got the right amount of power. But the question was "which would generate more heat, the high ohm resistor or the low ohm resistor?". Of course the answer is the low ohm resistor would generate more heat because it is dissipating more power. The wattage rating of the resistor has nothing to do with the amount of heat generated. Only the amount of power flowing (or being dissipated) in the resistor determines the amount of heat generated. A resistor rated for 100 watts will generate the same amount of heat as one rated for 10 watts provided the same amount of power is flowing in each (I squared R) or E I or E squared /R. ALL power dissipated in ANY resistor is directly converted into heat. A larger wattage resistor can handle more power than a lower wattage resistor but each will give off the same amount of heat with the same amount of power supplied because: ALL POWER DISSIPATED IN ANY RESISTOR IS DIRECTLY CONVERTED INTO HEAT. Regards
Gary
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