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- C Class, Autotrail Scout

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- Oct, 2013

I = Amps - Currant

R = Ohms - Resistance

The illustration shows a simple way to remember the three formulae.

From the middle pyramid, we can deduce that I = V/R (i.e. that current flow

*increases*with

increased voltage but

*reduces*with increased resistance).

Where E = Volts - Voltage

I = Amps - Currant

R = Ohms - Resistance

W = Watts - Wattage

You can calculate the amount of power if you know two of the three electrical values – voltage, current and resistance.

See the formulae in the wheel (E, like V, is used to indicate voltage).

e.g. I = W/E or E/R