Question

What is a light bulb made out of? Why do bulbs have two terminals? A fused bulb
does not glow. Why?

Answer 1

⠀⠀ ⠀ ⠀⠀ $\huge{\tt{\red{❥}\green{A}\purple{N}\pink{S}\blue{W}\orange{E}\red{R}}}$When the terminals of the bulb are connected with that of the electric cell by wires, the current passes through the filament of the bulb. This makes the bulb glow. ... Therefore, a fused bulb does not light up as no current passes through its filament. Now we know how to make a bulblight up using an electric cell.

Answer 2

Answer:

What is a light bulb made of ?

ans.Tungsten wire

ungsten wireIncandescent light bulbs consist of an air-tight glass enclosure (the envelope, or bulb) with a filament of tungsten wire inside the bulb, through which an electric current is passed. Contact wires and a base with two (or more) conductors provide electrical connections to the filament.

Why do bulbs have two terminals?

ans. The bulb glows when there is a flow of charge. The flow will be present only when charges go in and come out as the charges cannot stay inside the bulb. Thus two terminals are present, one for inlet and the other for outlet.

A fused bulbdoes not glow. Why?

ans. An electric bulb may fuse due to many reasons. One reason for a bulb to fuse is a break in its filament. A break in the filament of an electric bulb means a break in the path of the current between the terminals of the electric cell. Therefore, a fused bulb does not light up as no current passes through its filament.