Electric Cell

Let Us Learn About Electric Cell

An electrical cell is the cell which can act to convert one form of energy to another like chemical energy into electrical energy. The structure of an electric cell is very simple. There are two electrodes which are attached in an electric cell which carry different charges like one has positive charge and the other has negative charge. Both of these electrodes are dipped in the electrolytic solution which is known as electrolyte. When the cell is linked with the external circuits then electricity passes through the electrolyte and a chemical reaction is carried out. The atoms of the electrolyte are dissociated in positive and negative ions. In this way the electric cell acts as the direct source of electricity because of flow of ions.

The device which converts chemical energy into electrical energy is known as electric cell. Electric cell is a source of constant emf but not constant current.

Emf of cell (E): The potential difference across the terminals of a cell when it is not supplying any current is called it's emf.

Potential difference (V): The voltage across the terminals of a cell when it is supplying current to external resistance is called potential difference or terminal voltage. Potential difference is equal to the product of current and resistance of that given part i.e. V = iR.

Internal resistance of cell(r): In case of a cell the opposition of electrolyte to the flow of current through it is called internal resistance of cell