Current electricity(I) refers to the movement of electric charge (q) through a conductor over time(t). It is given by:

\(\rm I\)=$\frac{q}{t}$

\(\rm I\)=$\frac{C}{s}$

Its SI unit is Ampere (A). One ampere is defined as the flow of one coulomb of charge per second. \(\rm 1A\)= \(\rm 1Cs^-1\)

Pressure(P) is the force(F) applied on a surface per unit area(A). 

\(\rm P\)=$\frac{F}{A}$

\(\rm A\)=$\frac{N}{m^2}$

Its SI unit is Pascal (Pa) or Newton per metre square (\(\rm Nm^{-2} \) ).