explode.
it's the same formula, but as the AC voltage fluctuates (and changes sign) the wattage of an AC device is the average wattage of the device measures at each point over the entire AC cycle.
I don't think I esplained that well...
AC watts = f * ?(theta 0->2pi) V*A (d theta)
that's probably clear as mud too,
see this page:
yeah.
explode.
that.
A LOT higher. It always blows the bloody circuit breaker when I plug in a trolley of 16 laptops. Bring back fuses!
Mans tends to be sine, unless you're using a very rubbish invertor for your mains.
Of course not, but please keep in mind the OP had no idea what "power factor" or "VA" were in the first place. You don't take up all the complications right at the start.
Bob M.
Exactly.
You haven't taught basic electronics, have you?
Bob M.
mains.
mains voltage tend to be sine, but the current waveform can be anything at all, and for most types of DC powersupplies it is nothing like sine.
mains.
[slaps self on head]On Nov 11, 1:58=A0pm, RJ_32 wrote: > I've just read that a 25" tv (the set is 20 yrs old) uses only about 100 > watts. Is that true? It seems low.
Seems optimistic. TV power is related to the deflection angle so if power is low, I would guess the cabinet is farely deep to accomodate a lower deflection angle. Shallowest 25" I've seen was the Sony KX2501 at 16". It was well over 100 watts.
G=B2
True, pretty much everything I've done is dealing with 5V and 12V DC.
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