This is not a valid question by itself. Joules are units of energy, while Amps are units of electrical current. However, if you also know the Voltage of the electrical current, you can multiply the Current[Amps]*Voltage[Volts] to get the Power in Watts. Watts are equivalent to Joules per second. If you then know the amount of time of the current flow, you can calculate the total number of Joules by multiplying the Power[Watts]*Time[seconds] = Energy[Joules]
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You can't really convert that. If you multiply volts and amperes, you get watts, a unit of power. Watts is equivalent to joules/second. If you multiply volts x amperes x seconds, you get joules.
No. One amp is one amp. It does not matter how long you supply that current. You could say that one amp for 100 hours is 360,000 coulombs, but that is not a useful piece of information.Now, if you want to talk about energy, that is a different story, but you need to talk about watts, not amps.One amp is one coulomb per second.One volt is one joule per coulomb.One watt is one joule per second, which is why watts is amps times volts.One watt for 100 hours is 100 watt-hours, or 360,000 joules. Joules is energy. That is useful information.
KVA is kilo volt amp, and one needs to know both the voltage and the amperage, and possibly the phase angle. It is comparable with kilowatts for a resistive load.
It will have a fixed gain of 1. It is known as a voltage follower or a unity gain buffer.
200 amps is equal to zero kva. To answer this question a voltage is needed.