Learn and memorise some Physics Electricity Equations and Formulas
R=V/I
Resistance is potential difference divided by the current
P=IV
Electrical Power is Current multiplied by the potential difference
I=Q/t
Electrical Current is the electric charge passing by in unit time (second)
V=IR
Potential difference is the product of the electric current and the resistance
Vp/Vs = Np/Ns
In a transformer the voltage across a primary coil divided by the voltage across a secondary coil equals the number of turns in a primary coil divided by the number of turns in the secondary coil