|Jun26-10, 06:39 PM||#1| resistor power rating i have a question
about resistors. i thought they were described by their
resistance - 20 ohm, 40 ohm, 2 Megaohm, etc. how come I see
"power" values on resistors? for example my lightbulb says 40
watts. but i thought the power is simply P = V^2/R and that
would depend the voltage of my power outlet whatever that
happens to be. The power would only be partially determined by
the lightbulb. so what does it mean to see a power value on a
resistor? |Jun26-10, 06:52 PM||#2| Q, If you put too much
current through your resistor it will get too hot. There are
different resistor types intended for different degrees of power
they need to dissipate. Maybe P=I^2 * R, so it's a current
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