I read some articles and watched videos regarding 1 phase and 3 phase ac. And later found that for most home appliances we need 1 phase ac.
Then I came to know about live and neutral wires. Few articles said neutral wire (blue) has 0 potential. And live wire (red) has high potential. Neutral wire is to return the current back to source.
Another thing they said is since current is ac, the bulb in our home keeps dimming and lightning very fastly and it can't be noticed.
(I also read about earth wire. That was the thing that lead me to this question but I'll ask about that later)
All these things gave me 3 doubts for now.
- If neutral wire returns the current, the same which was in live/red wire, why doesn't it give shock?
- Would it make any difference if you connect the bulb using 2 different methods as shown in image? (I have assumed a blub is connected this way. There are two points, one for in and one for out)
- If current keeps changing its direction many times a second, that means current should keep flowing from red to blue, blue to red and continuously. How is it even possible to flow current from blue/neutral wire? Where would current come in blue wire? From Earth?
Okay these might seem too broad, but I believe these are very much related but I have separate doubts since I don't understand the concept fully.
PS: Simple and not very scientific language would be appreciated :)