Basic Circuit Analysis
Series Circuits

Section 1-1 Resistance in Series Circuits

 Definition Series CircuitA series circuit is one that has a single path for current flow.

Examples

 Circuit 1 This IS a series circuit because there is only one path for current flow; all current passes through the resistor Circuit 2 This IS a series circuit because there is a single path for current flow -- all current passes through resistors R1 and R2. Circuit 3 This IS a series circuit because there is a single path for current through all four lamps. Circuit 4 This is NOT a series circuit because there is more than one possible paths for current flow -- the current through R1 is not the same path as current through R2. Circuit 5 This is NOT a series circuit because there is  more than one path for current flow. Although all circuit current flows through resistor R1, resistors R2 and R3 offer two different paths for current. Circuit 6 This is NOT a series circuit because there is more than one path for current -- there is a separate path through each of the four lamps.

Some Applications of Series Circuits

Lamp and Switch

Fuse

Series Lamp Circuit