How bulb filament resist electric current
Answers
Explanation:
Filament lamps. ... It contains a thin coil of wire called the filament. This heats up when an electric current passes through it, and produces light as a result. The resistance of a lamp increases as the temperature of its filament increases.
Answer:
Filament of the bulb, is a thin coil made up of Tungsten or any other material of high melting point , present inside the bulb joins the positive and negative terminal .
We know that,
Resistance is inversely proportional to Area. So thin wire will have less area, and more resistance.
That is why filaments are made very thin to increase their resistance as more amount of charge particles will be resisted to flow freely through less space in thin wire.
This filament is always made up of materials having high melting point like Tungsten (3380° C) or similar metals.
The filament has a very high resistance due to which it produces heat
We know that,
Resistance is directly proportional to Heat. So more will be the resistance, more will be the heat.
Hence, the filament produces a lot of heat. Because the filament has high melting point it does not melt readily due the heat produced. Instead it dissipates the heat energy through glowing up that is by producing light
In this way, the filament of the bulb glows and resists electric current.