P - power measured in watts
E - voltage measured in volts
I - current measured in amperes
R - resistance measured in ohms
[tex]E=IR
\\P=IE[/tex]
1. P = 2000 W, E = 200 V, R = ?
[tex]P=IE
\\2000=I200
\\I=10
\\E=IR
\\200=10R
\\R=20[/tex]
2. P = 0.35 W, E = 150 V, R = ?
[tex]P=IE
\\0.35=I150
\\I= \frac{0.35}{150}
\\ E=IR
\\150=\frac{0.35}{150}R
\\R= \frac{150^2}{0.35}
\\R= 64285.71[/tex]
