ok this is the principal that i am confused with
It says that in an ideal circuit where wire and power resistance is neglected points which are electrically common should be measured to have zero voltage and have very little voltage drop between them.
( points that are not electrically common will be measured as the voltage of the battery so 6-1 will be 10 volts and 4-3 will be 10 volts(neglecting component resistance)( so will 4-2 ,4-1,6-2... will also get 10 volts when measured between the two points)
Between points 1 and 2 = 0 volts Points 1, 2, and 3 are (they can be considered as a single wire)
Between points 2 and 3 = 0 volts electrically common
Between points 1 and 3 = 0 volts
Between points 4 and 5 = 0 volts Points 4, 5, and 6 are
Between points 5 and 6 = 0 volts electrically common
Between points 4 and 6 = 0 volts
AND
Between points 1 and 4 = 10 volts
Between points 2 and 4 = 10 volts
Between points 3 and 4 = 10 volts (directly across the resistor)
Between points 1 and 5 = 10 volts
Between points 2 and 5 = 10 volts
Between points 3 and 5 = 10 volts
Between points 1 and 6 = 10 volts (directly across the battery)
Between points 2 and 6 = 10 volts
Between points 3 and 6 = 10 volts
And then the author makes examples of this principle relating to high current voltage lines , why birds don't get shocked and why one side is connected to ground
I think I am just not sure about the why there is no voltage between electrically common points and why birds can stand on power lines.
How would you explain "electrically common" to someone?