2006-11-10 17:12:40 · 11 answers · asked by Kelly K 1 in Science & Mathematics ➔ Engineering
If this is 230 V circuit
watts = 4600 w
If this is 110 V circuit
watts = 2200 w
2006-11-10 17:44:19 · answer #1 · answered by deansubasinghe 3 · 1⤊ 0⤋
Watts are a measure of power = Amps x voltage = amps x ( amps x resistance)
or in other words: P=V I = I^2 R, so here you need the resistance of the circuit.
I is in Amps, V is in Volts, Power is in Watts and Resistance is in Ohms. You must use a voltmeter or an ohmmeter to measure the resistance of the circuit, then you can answer the question.
Now if this is a practical problem you can assume 120 volts AC
so 120 volts x 20 amps = 2400 watts
but it is actually, 120 volts x 17 amps stable mean factor, in a regular houshold. If you are purchasing a generator, persay, I would choose one over 3000 watts to be on the safe side. If this is a physics problem for homework, you need one more variable, or assume a 120 volt AC.
2006-11-11 01:37:04 · answer #2 · answered by tsa 5 · 0⤊ 0⤋
If you assume the 20 amp circuit is on a 120 V then the watage is equal to:
20 A X 120V = 2400 W
2400 Watts
2006-11-11 01:48:25 · answer #3 · answered by Chels 3 · 0⤊ 0⤋
As the others have said you need to give the voltage to answer this question.
If you are on a 120V single phase system then you have 120*20=2400 Watts but if you are talking about how much you can put on a 20A breaker then you need to multiply by .8 (80%) to get the max load that is allowable by Code (here in the USA) Now you only have 1920W or 16A that you can use.
2006-11-11 08:24:46 · answer #4 · answered by cowboyweasel 2 · 0⤊ 0⤋
a watt is suposed to be voltage times amps so you need to know the voltage if you know amps is 20 then divide by the number of volts to get amps
2006-11-11 01:19:31 · answer #5 · answered by Anonymous · 0⤊ 0⤋
P=IV
120v household A/C?
I=current, you said 20amps
so 120x20= 2400watts
tho it may be a 20amp circuit it's rated more like 17amps continuous. A 15amp home circuit is really a 12 amp continuous.
2006-11-11 01:21:45 · answer #6 · answered by hogie0101 4 · 1⤊ 0⤋
I think Uoy need the value of Voltage Because
p=vi,
And you have 20 amp but you dont have voltage.
So get the value of voltage.
2006-11-11 01:39:20 · answer #7 · answered by Umesh C 1 · 0⤊ 0⤋
i think that watts are a measurement of how much electricity something uses.
2006-11-11 01:16:09 · answer #8 · answered by mrcarl92807 3 · 0⤊ 0⤋
P = VI = (I^2)R = (V^2)/r
Need either V or R to provide an answer.
2006-11-11 01:18:27 · answer #9 · answered by Helmut 7 · 0⤊ 0⤋
They are two different things. There is nothing to convert.
2006-11-11 01:16:33 · answer #10 · answered by sdh0407 5 · 0⤊ 0⤋