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Topic Content:
- Meaning of Chemical EnergyEnergy is the ability to do work. Energy exists in several forms such as heat, kinetic or mechanical energy, light, potential energy, and electrical energy. Units of Energy: The SI unit... More
- Cells
- Electrodes (CathodeA cathode is the electrode from which a conventional current leaves the electrolyte. It is the negative part of the cell where reduction takes place. More & AnodeAn anode is an electrode of a polarized electrical device through which conventional current enters the device. It is the positive part of electrolytes where oxidation takes place. More)
- ElectrolyteAn electrolyte is a substance that dissociates in water into charged particles called ions. Positively charged ions are called cations. Negatively charged ions are called anions. Simply, an electrolyte is a... More
- Simple Cell
- Working Principle of a Simple Cell
- Conventional Current Vs. Electron Flow
- Defects of Simple Cells
- Polarization (Meaning and Defects)
Local Action (Meaning and Defects)
- Polarization (Meaning and Defects)
A continuous flow of current can be achieved by generation of current from;
- Chemical energy.
- Heat energy.
- Solar energy.
- Mechanical energy.
Chemical Energy:
Electric current is produced from the chemical energy through the use of cells that convert the chemical energy into electrical energy.
Cells:
An electrical cell is an “electrical power supply”. What a cell does is convert stored chemical energy into electrical potential energy, allowing a current to flow from the positive terminal to the negative one via an external circuit.
A cell consists of electrodes that are separated by solutions of various acids or salts, called electrolytes.
Electrodes (Cathode & Anode):
Electrodes are the positive and negative terminals of a cell that are separated by a solution of various acids or salts.
The electrodeElectrodes are conductors, in the form of wires, rods or plates, through which current enters and leaves the electrolyte. When the current leaves the electrodes it is known as the cathode... More connected to the negative terminal of the battery is known as the cathode and the electrode connected to the positive terminal of the battery is known as anode.
Current can be thought of as the flow of positive charges, even though it is usually electrons, which have a negative charge, that carries current in a copper wire circuit.
Since the current is the flow of positive charge, the negative electrons flow in the opposite direction to this (conventional) current.
Within the cell itself, the charge flows from the negative terminal to the positive terminal as it gains electrical energy.
Electrolyte:
An electrolyte is the chemical composition of the cell in which the electrodes are immersed. The electrolyte is in a molten form so that the electrons would be able to move about and constitute a current.
Simple Cell:
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