All values are now known, as shown in the chart below, except the
voltage drop across each resistor.
The calculations for the voltage drops are performed by using the
Ohm's law formulas.
ER1 = IR1 X R1
ER2 = IR2 X R2
ER3 = IR3 X R3
= 2 A X 50
= 2 A X 15
= 2 A X 35
ER1 = 100 volts
ER2 = 30 volts
ER3 = 70 volts
When the values of ER1, ER2, and ER3 are inserted into the chart below,
it is readily seen that Et = ER1 + ER2 + ER3.