It depends in which country the equipment was purchased. If the country's voltage is 220 volts then it is most likely the supply needed for the PS3 is 220 volts. Check the nameplate on the device to see what the manufacturer recommends and stay at that voltage.
can you plug a 115 volt into a 110 volt
Not directly. Maybe with a proper adapter. Even if the TV plug fits into the receptacle (it shouldn't), the TV would not work and could possibly overheat or cause a fire, or be damaged internally.
Use a volt meter Plug a 120 volt accessory into it
NO
Yes.
no
Depends on what plug you are asking about.
The bulb will be about half as bright.
no
No, the voltage difference is too high.
Potato. Not really a question is it?
Yes