Question

formulars in electricity

Answer 1

v=ir

Answer 2

http://www.tscm.com/elecform.pdf

This is my favourite, but it is in Finnish - the formulas are universal, of course :-) :
https://noppa.aalto.fi/noppa/kurssi/s-55.1100/materiaali/S-55_1100_kaavakokoelma__k2011.pdf

Answer 3

f=k*q1*q2/r^2

Answer 4

voltage times current = power or watts
power usually = heat in a used from in electronics
resistance or R is the resiprircle of seimens or G
ohms triangle note in the drawing E=Voltage and not energy which joules or watts a second