Which of the following device works on the principle that the charge between the two flow if they are connected by a conducting wire:

The device that works on the principle that charge flows between two points if they are connected by a conducting wire is a Battery.

Here's a step-by-step explanation:

1. A battery consists of one or more cells, each of which contains a positive electrode (cathode) and a negative electrode (anode) immersed in an electrolyte.

2. When the battery is connected to a device (like a light bulb or a motor), a conducting wire forms a path between the negative and positive electrodes.

3. Chemical reactions within the battery cause electrons to build up at the anode. This creates an electric potential difference between the anode and the cathode.

4. Electrons naturally want to move from areas of high potential (the anode) to areas of low potential (the cathode). However, they cannot move directly through the electrolyte.

5. When a conducting wire is connected between the anode and the cathode, it provides a path for the electrons to move. This movement of electrons is what we call electric current.

6. The device (light bulb, motor, etc.) that's connected to the battery uses this electric current to operate.