Most unknown values in a series circuit may be calculated a number of
different ways with various formulas. The shortest method of
calculation is determined by analyzing the information given in the
problem. Recognizing the shortest possible way to solve a problem
comes with practice and experience.
In the circuit above, the values of ER1 ER2, ER3, IR, IR2, and IR3 are to
be calculated. Referring to the chart below, analyze the known