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what are volts and amps, and how are they used to calculate watts?

rkbrookover

wrote...

Posts: 156

Rep:

12 years ago

what are volts and amps, and how are they used to calculate watts?

I have heard these terms in many applications for years, and get by fixing things without really knowing what they actually are, but I'd really like a very basic/dummy explanation. thanks!

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$abood$

wrote...

#1

12 years ago

Using the water analogy, voltage is the pressure while current is the amount of water flowing.

For a purely resistive load, power in watts = voltage in volts x current in amperes

If you have reactances due to capacitors and inductors then there's real power and apparent power. Real power is measured in watts, while the latter is in volt-amperes.

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