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What is the Difference between watt and VA?

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We know that Power = Voltage(V) X Current(I) and power is measured in terms of watts as well as volt-amperes. However, for AC circuits, based on the observation that the voltage considered is often an average measure, VA often tends to be a far higher number as compared to the actual "wattage".

Based on some information I found at the Argonne national laboratory site:
the explanation found was:

1 joule = the energy generated when 1 ampere of electrical
current, passes through an electrical potential drop of 1 volt. Energy =
Volts x Current.

1 watt = 1 joule/second.

So joules is a quantity of energy, and watts is the RATE of generation of
energy. Watt = Energy / second.
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