The battery or cell serves as a source of electrical energy. The chemical reaction within the cell generates a potential difference between its terminals, initiating the flow of electrons and establishing a current in a connected circuit.

Connecting an electric bulb and an electric heater in a series circuit is impractical because these devices need currents of widely different values to operate properly. Series circuits maintain a constant current, making it unsuitable for devices with diverse current ...

In a series circuit, when one component fails, the entire circuit is disrupted. Electricians have to spend time testing each bulb individually to find the one that has fused or gone, making the troubleshooting process time-consuming.

In a parallel circuit, the current is divided among the electrical gadgets connected. This is in contrast to a series circuit where the current remains constant throughout the circuit.

One major disadvantage of a series circuit is that if one component fails, the entire circuit is broken, and none of the components works. This can lead to a complete failure of the electrical system.