The answer is: simply because of historical reasons. Somebody once started distributing 110V ac and appliances were sold to match this. By going this way, it became a standard. In some European countries we've seen the same value being used in the past. I do know that in the 1950s a change and standardization of 220V ac was implemented in the Netherlands, where different values were used in different local nets before. The benefits of standardization are clear (travelling - easier distribution of equipment, and so on).
The choice for 220V (now 230V) was based on reducing the distribution losses: the higher the voltage, the lower the distribution loss because the current is then also lower, for the same amount of electrical power.
Only use 110-120 volt appliances on a 110 volt socket.
no
No. 110 volt is AC current
No, unless it is dual rated for 110 - 220 volt use. Check the manual or look at the rating sticker that should be somewhere on the printer.
You need a step down voltage transformer that converts 220 volt to 110 volt to use a 110 volt printer with 220 volt. You can get good quality transformers at East West International in Houston, TX. If you order online or over the phone, they can ship it to you in 2-3 business days.
yes
No a 230 volt appliance should not be pluuged into a 110 volt socket (And vice versa) you need to buy a converter that can be plugged into the 110 volt outlet then the appliance can be plugged into the converter.
Yes, the two voltages are in the same voltage range.
Yes the 115 volts you read is just the maximum it will handle.
Typically they are either 220V or 110 volts not both. Plugging a 11o volt blanket to a 220 volt line has a huge risk of fire.
NO
Yes