How is it that an electric bulb lights up as soon as we turn the switch on?
Answers
Answer:
Explanation:
A switch does the job of breaking the flow of electicity when it is off. While we switch it on electricity starts flowing to the filament of the bulb which heats up. The heat energy is converted to light and the bulb starts glowing
Qᴜᴇsᴛɪᴏɴ✯
How is it that an electric bulb lights up as soon as we turn the switch on?
Aɴsᴡᴇʀ✯
Inside a solid,the atoms are packed together with very little spacing between them.When a steady current flows through a conductor, the electrons in it move with a certain average 'drift speed'.This drift speed is very small,about 1mmps.
Exᴘʟᴀɴᴀᴛɪᴏɴ✯
The electric field propagates very fast, probably slower than light but comparable to that, and electrons that are already present in the filament will start moving as soon as they start being drifted. ... Current propagates at the speed of light. That's why the light bulb lights up almost instantly.