In an older CRT television sets steel, copper, lead, tin, aluminum and gold would be likely metals. Steel would be used for certain electronic parts, screws and brackets. Lead and tin are used for the solder that is used to connect the electronic parts to the PC (printed circuit) board. Solder is also used to put a thin coat on the surface of the traces (flat wires) on the PC board. Copper is used for certain electronic parts, PC board traces and wires. Aluminum is used for brackets and heat sinks. Gold is used in very small amounts inside of ICs (integrated circuits) to attach the silicon integrated circuit to the leads that are used to attach the IC to the PC board.
A TV is known as a TV Set because of the "set of components" that were used to make up the unit. In the early days you would ask for a TV set and be given the necessary valves, tubes etc to put together the "set". Likewise you would ask for a radio set if you were going to put together an old valve radio.
A wireless TV sender is used to send the signal from a satellite or cable set top box to a television in another room. The transmitter connects to the set top box by a cable. It then sends the signal to a receiver box which is connected to the television set. The signal is set via wireless and hence there is no need for unsightly cabling.
The materials used to make televisions include lots of plastics for the case & structure of the set and metals for the wiring and other components. Inside there is an electrical circuit board that carries high voltages (potentially lethal voltages). The most obvious thing inside is the picture-tube (assuming a common Cathode-ray type TV), the large pointy thing with a bundle of wires plugged into the pointy end. This is made of metals, plastics and glass. Poking around inside a TV can be VERY hazardous to your health as the high voltages can KILL you.
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