hello everybody


look with me at this picture

it's a sinusal source

and what I know is that sinusal doesn't have polarity
and the current throw it is alternating

and here he is drawing polarities for the sourse




am I wright?

 

][ Shocked ][

it's a sinusal source

and what I know is that sinusal doesn't have polarity
and the current throw it is alternating

and here he is drawing polarities for the sourse




am I wright?

I think he is trying to indicate that the phase reference for all three voltage sources are at the center node "n".

By the way, right does not have a "w", but wrong does.

Ratch

 

ok, so he is wrong

and thank u for correcting me ^^

 

ok, so he is wrong

^^

Not necessarily - Ratch explained your teacher is probably trying to indicate what the relative phase relationships of the individual phase voltages are with respect to the common or neutral 'n' connection. True - it's not the best way to do this and probably leads to confusion (as you have experienced!). It will be an acceptable convention for some people.

 

ok, im getting it now

thx alot guys

 

for reference sake, you are looking at the circuit in some point of time. It could just have easily been the opposite polarities. I'm sure the point of the exercise was to relate to the differences between the circuit nodes, not the difference in time.