Electrics (last minute check up for test tommorrow)

[stardust rain]

Electrics -Power, energy transfer- (last minute check up for test tommorrow)

(Long time lurker, first time poster here. Hi all)

I've learned about current, coloumb (sp?) resistance, voltage and so on. I know that resistance is V/I, how to caltulate colombs but I get really confused when it comes to energy transfer and power.

I know the formula, but I don't understand it at all. Can you work out the power from just the energy output and time taken? What does it mean by energy transfer? Can you work that out from the current, time and power?

And also, I'd like any other help/advice concernig electricity as well.

*Any* help would really, really appreciated, since this text is going to decide on my grade for the term. And I'm on fail level right now thanks to a crappy teacher.

 

[nmondal]

I guess if W is the work then that is the Energy,
and Power is really is synonym for dW/dt = P the power.

So that is that.

By the way W = Integral_over_time[Power] !