How much power is consumed by a load drawing 5 A with 120 V across it?

Answer 1

600W

W = V*A

Answer 2

I can see it requires an expert to answer this problem. Textbooks only go so far, but reality goes further.

120V * 5 Amps = 600VA. (No question about it)
No one even thought about power factor. That my friend is.778 multiplier, because you only use about .778 of the 60 Hertz sine wave on the out put.
600 * .778 = 466.80 watts.
And of course this equation is designed for switch mode power supplies.

This is a good example. Say you are going to buy a UPS for your computer. Your power supply is 450 watts. Is that 600VA UPS, big enough for this system, or would you have problems? Answer, you would have problems. You would say, why? you have 466.8 watts to play with. To expand on this answer, it is very simple. The 466.8 watts is the full load out put when the unit is hot. When the unit is cold, or the transformer windings from the inverter are cold and not on yet, you have induction from the inverter that will chew up 50 watts on a start up. So the equation is not finished yet. You have to subtract 50 watts on the start up of your by-pass of your inverter so the true value is 416 watts on a full load, and you won't get 15 minutes for a run time. Fact is, your inverter will eventually crash and burn with a short life if you constantly drain your battery. Here is something we can add to the equation.
Linear power supplies draw 1/3 more power, like telephone systems power supplies.
So we have to add 1/3 more to the load that is 600Watts. We need more power. There is absolutely no doubt in my mind that this 600VA UPS will crash and burn in less the 6 weeks or months. APC six weeks, Powerware six months.

I would use a 750-watt to 800 watt UPS with a switch mode power supply. On a phone system linear power supply I would use a 1000VA UPS.

One last thing. Our constant will always be 120V. Our variable will always be the current draw. So if you use a UPS, make sure that what ever you plug into it, add up all your amp values then mulitiply your voltage and then you will have a VA value. Don't forget the power factor. It will fool you, not to mention if you plug in a wally wart transformer in your you UPS. That ends today’s lesson on UPS and Power.
I do take tips, or maybe an apple or two!

Answer 3

For single phase, Power = Volts * Current

so Power = 5 * 120 = 600 watts or .6 kw

Answer 4

P=I x E 5 x120 = 600 Watts

Answer 5

according to ohm's law volts*amps=watts
so 5*120=600

Answer 6

p = VI

V = 120 v
I = 5A
P = 120 * 5
P = 600 Watts

Answer 7

600 watts