
There are 2 types of circuits.... Series and Parallel.
 Series Circuits
 Are connected in
a straight line, like a chain.
 All current
remains the same throughout the circuit.
 There can be
many different voltages in a series circuit, as a voltage drop
appears across every resistor.
 The total
voltage in a series circuit is equal to the sum of all the
individual voltage drops within the circuit.
 The total
resistance in a series circuit is equal to the sum of all the
individual resistances within the circuit.
 The formula for
Resistance in Series is:
 Parallel Circuits
 Are connected
allowing multiple paths for current flow.
 All voltage
remains the same throughout the circuit.
 There can be
many different currents in a parallel circuit, as each leg has the
same voltage, but can have a different resistance.
 The total
current in a parallel circuit is equal to the sum of all the
individual currents on each leg of the circuit.
 The formula for
Current in Parallel is:
 Resistance is
found by reciprocating the sum of the reciprocals of the resistance
of the individual branches
 The formula for
Resistance in Parallel is:
1

1
1
1
1 1
 +  +
 +  +  +
R_{1}
R_{2}
R_{3}
R_{4} R_{X...}
 Ohm's Law states that there is a relationship which exists
between current, resistance, and voltage, such that E =
I x R

