Mobiles could distract you while driving and some smartphones give off potentially harmful radiation. They also hurt if one hits you on the head.
cause leave it and it turns off
This question may be asking if it is safe to plug things into mains wall sockets if they have been left switched on with nothing plugged-in, and if it is safer to plug things in only after the sockets have been switched off? If, and only if, that is the meaning of this question, the answer is probably: It should not be dangerous to plug something into a switched-on socket but it is always a good idea - and safer - to switch off any socket before you plug anything into it. +++ The hazard is not in the plugging-in, but may arise from the appliance itself, if it starts unexpectedly.
Someone switched off the light.
switched-off i believe
because operating system is on while phone is switched off
the information is lost after power is switched off.
Using a mobile phone is dangerous full stop. The more you use it the greater the damage. Experts have come to the conclusion that mobiles should only be used in emergencies due to the damage they cause. But even if you hardly ever turn your phone on, you can never escape them because everyone around you has theirs switched on at all times. The only time you are safe is in an exam where everyone turns their phone off for fear of disqualification. And its not just mobiles. Its phone masts, power stations etc. The best you can do is to leave your phone off as much as possible and don't get wireless technology eg. cordless phones
Yes they can be because they give off radiation.
subaru legacy engine is switched off when stop after drive
An electro-magnet can be turned on and off.
When a car horn goes off while the car is switched off, it means the horn has a bad ground.