Ohm's lawLoading applet, be patient

Luciano Troilo, created with GeoGebra 
the electric circuit 
how you build it 


Cover with a finger, the symbol of the electric quantity that you search and then read the formula 
All formulas that link, resistance, current, voltage and power in a resistor 
physical quantity 
symbol 
unit of measurement 
unit abbreviation 
definition 
voltage (electrical potential difference) 
E or V 
volt 
V 
1V: the work which would have to be done to move the charge of 1 coulomb between two points is equal to 1 joule 
current 
I 
ampère 
A 
1A: charge flowing through some surface at the rate of one coulomb per second. 
resistance 
R 
ohm 
Ω 
1 Ω: resistance between two points of a conductor when a constant potential difference of 1 volt, applied to these points, produces in the conductor a current of 1 ampere 