Arrangement
The dry cells are connected facing the same way.
All the components are connected end to end in one path to the source of the electrical energy.
Current
The current that flows at every point in the circuit is the same.
Voltage
The voltage across the circuit is equal to the sum of the voltage across each bulb
Series circuit
Resistance
e effective resistance of the circuit is equal to the sum of the resistance of the bulbs in the circuit
Advantage
All components are controlled by the same switch.