Lösning 4.4:8
FörberedandeFysik
(Skillnad mellan versioner)
| Rad 1: | Rad 1: | ||
<math>P = 800 W</math> <math>U = 115 V</math> <math>P = U\cdot I \Rightarrow 800 = 115\cdot I</math><br\> | <math>P = 800 W</math> <math>U = 115 V</math> <math>P = U\cdot I \Rightarrow 800 = 115\cdot I</math><br\> | ||
<math>I=6,96 A</math> <math>\omega = 314 rad/s</math> | <math>I=6,96 A</math> <math>\omega = 314 rad/s</math> | ||
| + | |||
<math>230 = \sqrt{(115)^2 + (U_c)^2} \Rightarrow U_c = 199,2 V</math> <math>U_c = I\cdot 1/ \omega C</math><br\> | <math>230 = \sqrt{(115)^2 + (U_c)^2} \Rightarrow U_c = 199,2 V</math> <math>U_c = I\cdot 1/ \omega C</math><br\> | ||
Versionen från 26 januari 2010 kl. 09.59
\displaystyle P = 800 W \displaystyle U = 115 V \displaystyle P = U\cdot I \Rightarrow 800 = 115\cdot I
\displaystyle I=6,96 A \displaystyle \omega = 314 rad/s
\displaystyle 230 = \sqrt{(115)^2 + (U_c)^2} \Rightarrow U_c = 199,2 V \displaystyle U_c = I\cdot 1/ \omega C
\displaystyle C = 1,1 \cdot 10^{-4} F(110\mu F)
