I'm a little disappointed that no-one else has tried to help explain to you, because I'm sure that plenty of others will understand what I've been getting at (even if they don't agree with me).
It does not need explaining to me, it is you that is not getting it.
Simple question, possibly three answers to the effect of:
*Yes
*No
*How is that done?
If the question is beyond the understanding of the OP, then they and electrics are best kept apart!