Worksheet for Series Circuits
SAR Physics
AM Kolchin
Instructions
1. This worksheet is to be completed in class while work
ing together. Please don’t go ahead of the class.
2. Calculations are to be done showing equations and units.
Please don’t just write down numbers without expla
nation.
3. No calculators are to be used unless explicitly stated.
4.
The worksheet is to be handed in at the end of
class even if it has not been completed.
Series Circuits
:
1. In a series circuit there is only one path for the current to
take.
2. The resistances can be replaced by an ”equivalent resis
tance” that leaves the current unchanged.
It is found by
adding up all of the resistances in the series circuit:
R
EQ
=
R
1
+
R
2
+
R
3
+
....
3. Ohm’s Law (
V
=
IR
or
I
=
V/R
) can be applied between
any two points in a circuit.
1
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Below is a series circuit with two resistances.
The resistances
are:
R
1
=
4 Ω
R
2
=
8 Ω
A voltage of:
V
T
=
120
V
is maintained between points a and c.
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 Spring '08
 Staff
 Physics, Work, Summation, Electrical resistance, Voltage drop, Series Circuits

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