Radio consists of associate degree antenna, computer circuit board, resistors, capacitors, coils and transformers, transistors, integrated circuits, and a speaker. All of those elements are housed in a very plastic case.
An internal antenna consists of small-diameter insulated copper wire wound around a solid solution core. associate degree external antenna consists of many aluminium tubes that slide inside each other.
The computer circuit board consists of a copper-clad pattern cemented to a phenolic resin board. The copper pattern is that the wiring from element to element. It replaces most of the wiring utilized in earlier radios.
Resistors limit the flow of electricity. They contains a carbon film deposited on a cylindrical substrate, in cased in a very plastic (alkyd polyester) housing, with wire leads manufactured from copper.
Capacitors store associate degree electrical charge and permit electricity to flow through associate degree electric circuit however forestall electrical energy from flowing within the same circuit. fastened capacitors contains 2 extended foil electrodes insulated by plastic film, housed in a very plastic or ceramic housing with copper wire leads. Variable capacitors have a group of fastened aluminium plates associate degreed a group of rotating aluminium plates with an air nonconductor.
Coils and transformers perform similar functions. Their purpose is to insulate a circuit whereas transferring energy from one circuit to a different. They contains 2 or a lot of sets of copper wire coils either wound on associate degree nonconductor or mounted side-by-side with air because the nonconductor.
Transistors contains semiconductor or atomic number 14 in cased in a very metal housing with copper wire leads. The electronic transistor controls the flow of electricity in a very circuit. Transistors replaced vacuum tubes utilized in earlier radios.
The microcircuit homes thousands of resistors, capacitors, and transistors into a little and compact package known as a chip. This chip is regarding the scale of the nail on the limited finger. The chip is mounted in a very plastic case with aluminium tabs that permit it to be mounted to a computer circuit board.
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