If, by 'unit price', you mean the cost per kilowatt hour, then there is normally no difference between the cost of energy supplied whether by single-phase or three-phase supplies.
They will not be very different.
single phase, double phase & three phase
If you have three adjacent houses each with a single-phase supply taken from different phases in a three-phase cable in the street, the total power is equal to the sum of the powers in each of the three phases.
The difference between a single phase and a three phase motor is the amount of power conductors that feed the device. As to the other part of the question a three phase motor will not start or run on single phase. The phase angles on three phase are 120 degrees apart on a single phase system they are 180 degrees apart.
Yes, there a difference between three phase and single phase electrical supply services.
Yes, there is a difference between single phase and three phase circuits.
There is no such thing as a two phase instrument. There is only single phase and three phase. You can only have: single phase/ one pole single phase/ two pole three phase/ three pole
They will not be very different.
single phase, double phase & three phase
Any load that needs three legs from a three phase system can not be considered single phase. Single phase from a three phase system only needs a connection to two legs.
If you have three adjacent houses each with a single-phase supply taken from different phases in a three-phase cable in the street, the total power is equal to the sum of the powers in each of the three phases.
No A intermediate switch can not be used to change three phase to single phase.
Single phase.
Single phase inherently requires less equipment (it's cheaper). Three phase motors are more efficient than single phase.
The difference between a single phase and a three phase motor is the amount of power conductors that feed the device. As to the other part of the question a three phase motor will not start or run on single phase. The phase angles on three phase are 120 degrees apart on a single phase system they are 180 degrees apart.
In Europe they have both single phase and three phase.
The construction of the core is different. Most 'core-type' three-phase transformers have three limbs. Additionally, there are three sets of primary windings, and three sets of secondary windings.