It is very risky, if you have an old phone or if you have a frayed cord, because it can start a fire. But you should be fine.
no
Yes you can.
yes
very it could explode
Keep it turned off while charging.
it doesnt matter. if you turn it off, it will charge faster. if you leave it on you can still use it, but it charges slower.
This sounds like it is a difference with your model of phone. Most phones do vibrate while they charge.
It is safe to continue working on your tablet while charging it. There is no adverse effect. You should not however leave your tablet on charge all the time or it can affect your devices battery life.
There may be other reasons, but one reason is, cell phone batteries can explode or catch fire while charging. It's not a common occurrence, but it does happen.
In most cases, you can leave the state for vacation without notifying anyone. You cannot be gone for a long period of time without any intention to return.
no you don't have to but if you want to use it while it is charging then you can
That cats is gonna pig out.