It depends. In some cases it may destroy some components. Depends on application and rating of components in use.
It works normally. Well actually there are 380 volts across two lines of a 3 phase AC source, so it should work normally.
No, you will not obtain 230 volts. From a wye connected three phase 480 volt supply, 277 volts can be obtained from one phase leg and the neutral on the wye connection. 480 volts/1.73 (sq. root of 3) = 277 volts.
Your description of the system is either contradictory or incomplete, therefor no answer can be given.
3 Kv = 3,000 volts.
Zener diodes attempt to keep the voltage across their terminals constant. They are often used in power supplies to regulate output voltage to 3, 9, 12, 15, etc. volts. Unlike a typical diode, current may be allowed to flow in either direction to regulate the output voltage.
Because they are connected in series. Lets say you have a flashlight that holds 2 D cell batteries. Each battery puts out 1.5 volts. Connect them in series and together they put out 3 volts. The flashlight is designed to run on 3 volts. A electronic device that uses 4 AA batteries is using 6 volts even though each battery is only putting out 1.5 volts. Connected in series you add to the voltage with the addition of each new battery.
4.5 volts in series; 1.5 volts in parallel.
It works normally. Well actually there are 380 volts across two lines of a 3 phase AC source, so it should work normally.
No. Your power supply must be able to supply rated voltage (12 volts) and rated current (3 amps).
The NEMA 6-20R is a 2 pole 3 wire grounding receptacle that is rated for 250 volts. It is not meant to have a neutral wire connected to it. The receptacle is designed to have 240 volts connected to it.
Unlikely. 3 volts in stead of 4.5 volts is a too big gap between that it gets and what it expects.
9/3 = 3 volts per millimeter = 3,000 volts per meter.
No, you will not obtain 230 volts. From a wye connected three phase 480 volt supply, 277 volts can be obtained from one phase leg and the neutral on the wye connection. 480 volts/1.73 (sq. root of 3) = 277 volts.
According to me the information about the 3 Volts DC batteries is incomplete i.e.The amp-hr capacity is not provided.If this is known then the answer would be 3X the amp-hr .
difference is 2.7 amperes in numbers will be 12 volts 3 amps and the other will be 12 volts .3 amps
The voltmeter would read 12 volts. An ammeter connected to to battery would only read 4 amps (12 volts divided by 3 ohms =4)
If all four lamps are identical, there will be an identical voltage drop on each. 3 volts / 4 lamps = 0.75 voltage drop at each light.