House wiring? (slightly off-topic)
Dana Scott
danas at egosys.com
Wed Dec 27 22:01:08 CET 2000
Does this mean that a 1/4 watt resistor always draws 1/4 watt too?
Then why don't my flashlight bulbs burn out when the batteries go
dead?
I'm going to save this post. It is a classic. LOL.
-Dana
>If you test a 100 watt bulb you'll find it always draws a 100 watts,
to keep
>it's side of ohm's law balanced, it must draw more current (generate
more
>heat) at a lower voltage. This proves true in the lab, you can
quickly burn
>out a bulb buy lowering the AC voltage. Sort of. The reality is its
in a AC
>environment. This means it will behave like an frequency dependant
impedance
>(like a speaker for example) and the actual current draw is a more
>complicated to calculate. However the ohm's law still rules. If the
watt's
>remain the same and you lower the voltage the current draw will
increase.
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