Question

Why is the filament of an incandescent bulb made of very thin tungsten wire?

Answer 1

We know resistance is inversely proportional to area of crosection. So if area of crosection is small we will hace and high resistance and therefore power of the bulb will be more as power is directly proportional to resistance.

Answer 2

Answer:

Tungsten is used for making filament of an electric bulb due to the following reasons: Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature. The lamp glows at high temperatures.