CD CELL Meaning and
Definition
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Cd cell is an abbreviation for Cadmium Cell, also known as a photocell or light-dependent resistor (LDR). It is an electronic component that varies its resistance according to the amount of light that falls on its surface. The resistance of a Cd cell decreases as the illumination increases, and vice versa.
A Cd cell is typically made using cadmium sulfide (CdS) as the sensing material. It consists of a thin flat disk with a photosensitive surface on one side. The other side is usually enclosed to prevent light leakage and protect the cell from physical damage.
When light hits the surface of a Cd cell, the photons are absorbed by the cadmium sulfide material, causing the electrons to be excited to a higher energy state. This leads to a decrease in electrical resistivity, allowing more current flow through the device. In contrast, in darkness or low-light conditions, there is less excitation of electrons, resulting in higher resistance and minimal current flow.
The photocell's output can be utilized in numerous applications, such as automatic lighting controls, exposure meters, alarm systems, and optical sensing circuits. When connected in a circuit, the resistance of the Cd cell can be used to control the activation or deactivation of other electronic components based on the prevailing light conditions.
Due to the toxic nature of cadmium, the use of Cd cells has decreased with time, and alternative materials like amorphous silicon and indium tin oxide are being employed for light-sensing applications.
Common Misspellings for CD CELL
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Etymology of CD CELL
The term "Cd Cell" refers to a type of photovoltaic device that uses cadmium as a material in its construction. Its etymology can be broken down as follows:
1. Cd: This is the chemical symbol for the element cadmium in the periodic table. The symbol "Cd" is derived from the Latin word "cadmium", which itself has its origin in the Greek word "kadmeia" or "kadmeion". The element was named after Cadmus, a mythical Phoenician prince who is credited with introducing the alphabet to the Greeks.
2. Cell: In the context of Cd Cell, the term "cell" refers to an electrical device that converts light energy into electrical energy. The term originated from the Latin word "cella", meaning "small room" or "chamber".
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