The ralationship between currence and voltages in a series and parallel circuit

Question 1

What is the chart of the series and parallel formulas:

Answer 1

Series -
I - It=I1=I2
Vt=V1+V2
Rt= R1+ R2
Parallel-
It=I1+I2
Vt= V1=V2
1/Rt= 1/R1+1/R2