Verified answer

110 volts electronics used in 220 volts country?

Boom + Fire and if you're lucky, just a destroyed device.

220 volts electronics used in 110 volts country?

Depending on the device, it might just not start at all. In this case, the source voltage is too low for the device to get enough "umph" (electro-motive force) to operate.

Bad things will happen to both the equipment and the person who tries something stupid like that.

either your Electronic divise would blow up or it would go bye bye