LESSON NOTE
|
VT |
IT |
RT |
V1 |
I1 |
R1 |
V2 |
I2 |
R2 |
V3 |
I3 |
R3 |
V4 |
I4 |
R4 |
The first row represents the voltage drop, current and resistance for the
total circuit. The next row is the
voltage drop, current and resistance at the first load. The following row is for the second
load. And so on…
ABOUT
THE ROWS OF THE TABLE
For any row, if we have a
single unknown, we can use Ohm’s Law to solve for that unknown.
ABOUT
THE COLUMNS OF THE TABLE
We can also solve for a single unknown in columns. However, this requires that we use the
properties of series circuits.
So, for voltage, we know that
the total voltage down (VT) is equal to V1 + V2 + V3 + …
For current, we know that the
current is the same everywhere. So IT = I1 = I2 = I3 = …
For resistance, we know that RT
= R1 + R2 + R3 + …