It is longer so that when we put the plug into the socket, earth connection is made first for the safety.
It is thicker so that it is not inserted to the holes of live and neutral.
It has split ends so that the plug is fitted firmly into the socket to avoid sparking.
Why is echo not heard in our living rooms? To hear echo, the minimum distance between the source and the reflector must be 17m. When this distance is more than 17m, the reflected sound can be distinguished from the original. As the length of our rooms is less than 17m, we don't hear echo.
Comments
Post a Comment