What are the advantages and disadvantages of the incandescent bulb?

What are the advantages and disadvantages of the incandescent bulb?

Reading time: <1 minut The incandescent bulb consists of a filament (very thin wire) enclosed in a vacuum glass vessel (from which, to avoid "oxidation" of the filament, air was removed). When I apply an electrical voltage to the ends of the filament, it heats up until it becomes incandescent (emits light).

 3,214 total hits, 19 hits today

What is the primary coil and what is the secondary coil on a transformer?

What is the primary coil and what is the secondary coil on a transformer?

Reading time: 2 minute The presented article refers to the grid transformers with sheet metal core. The vast majority of such transformers are of the "descending" type, ie they have a coil connected to 220V (which is why it is called the primary coil) and output lower voltages in all other coils (called secondary coils).

 3,226 total hits, 5 hits today