Difference of Closed and Open Circuit

Difference of Closed and Open Circuit

Hello Engineers, let us come from basics. A system in which the output quantity has no effect upon the input to the control process are called open-loop control systems, and that open-loop systems are just that, open ended non-feedback systems. But the goal of electronic control system is to measure, monitor, and control a process and one way in which we can accurately control the process is by monitoring its output.

We call flow of charge is called current. And in order to create the flow, we need a force. That we are achieving the positive charge and negative charge.

As positive charge and negative charge attract each other we create a circuit and make it flow.

Consider the diagram:

Here in order to glow the bulb, we need current (flow of charge) So we connecting a source, here battery.

Closed circuit.

Once we make the circuit complete +ve charge and -ve charge attracts each other. Thus creating a flow of electrons i.e. current. This complete circuit is called closed circuit.

Open Circuit

If you disconnect any side of the source or anywhere along the line the +ve charge and – charge cannot have any kind of attraction between each other resulting from an absence of flow of electrons. This incomplete circuit is called open circuit.

An electronic control system with one or more feedback paths is called a Closed-loop System. Closed-loop control systems are also called “feedback control systems” are very common in process control and electronic control systems. 

In a closed-loop system, a controller is used to compare the output of a system with the required condition and convert the error into a control action designed to reduce the error and bring the output of the system back to the desired response. Shown Relay work some time closed and open based on signal input in coil side.