Yes. You can charge your I-Phone when it is turned off.
no
The Battery, if you are meaning electrical charge in a laptop?
You can charge your iPad either way - it doesn't need to be on or off. However, the most effective way is to charge your iPad when it's off. It will charge much faster.
yes
umm..... no, that is ofcourse, unless you have a lamp in your apple
Keep it turned off while charging.
Anything greater than 2 amps when it is turned on. Almost any current at all when it is turned off (it still takes a small current in the milliamp range when turned off). This is why it will charge faster if you turn it off when charging.
Yes. When i was charging it, I turned off my Xbox and the lights still indicated it was charging.
It takes shorter time for it to charge when it is on. Trust me! I have an apple laptop, and whenever I have it on, it charges like, super fast. Well not SUPER fast, but fast. So keep your computer on when you charge it. (As long as it's an apple)! ;P
yes u can cuz if its off and you plug in the charger, it will turn the phone on and chareg it.
Capacitor