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Exemplos para o cálculo <strong>de</strong> potência<br />
R<br />
V i<br />
v = V.sen w.t<br />
v<br />
i=<br />
R + jxl<br />
P =V.I<br />
S = V.I<br />
P = V.I.cosϕ<br />
127V 0 o<br />
127V 0 o<br />
z = R + j X L<br />
S = V . I<br />
I =<br />
v<br />
=<br />
R + jxl<br />
R<br />
R<br />
L<br />
v<br />
z<br />
L<br />
1H<br />
Lâmpada ou / e chuveiro<br />
S = P =<br />
V<br />
I = =<br />
z<br />
2<br />
127<br />
= V.I<br />
R<br />
o<br />
v(<br />
0 )<br />
2πfl<br />
z(<br />
arctg )<br />
R