2.
Rezystancja przy poprawnym pomiarze napięcia:
$$R = \frac{U}{I}$$
$$R_{1} = \frac{14V}{0,02A} = 700\mathrm{\Omega}$$
$$R_{2} = \frac{17V}{0,025A} = 680\mathrm{\Omega}$$
Rezystancja przy poprawnym pomiarze prądu:
$$R_{1} = \frac{15V}{0,02A} = 750\mathrm{\Omega}$$
$$R_{2} = \frac{19V}{0,025A} = 760\Omega$$
3.
$$R_{1} = \frac{4V}{0,02A} = 700\Omega$$
$$R_{2} = \frac{4V}{0,02A} = 700\Omega$$
$$R_{3} = \frac{4V}{0,02A} = 700\Omega$$
4.
a.
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{300V + 300V + 300V}{3} = 300V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{0,925A + 0,925A + 0,925A}{3} = 300A$$
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{175V + 175V + 175V}{3} = 175V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{0,91A + 0,91A + 0,91A}{3} = 0,91A$$
b.
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{250V + 250V + 250V}{3} = 250V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{0,775A + 0,775A + 0,775A}{3} = 0,775A$$
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{140V + 140V + 140V}{3} = 140V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{0,76A + 0,76A + 0,76A}{3} = 0,76A$$
$$U = \sqrt{3}U_{f}$$
$$U = \sqrt{3} \bullet 175V$$
U = 303V
I = If
5.
a.
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{150V + 150V + 150V}{3} = 150V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{1,35A + 1,35A + 1,35A}{3} = 1,35A$$
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{150V + 150V + 150V}{3} = 150V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{0,8A + 0,8A + 0,8A}{3} = 0,8A$$
b.
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{100V + 100V + 100V}{3} = 100V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{0,875A + 0,875A + 0,875A}{3} = 0,875A$$
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{100V + 100V + 100V}{3} = 100V$$
$$\sum_{i = 1}^{n}{\frac{U_{i}}{n} =}\frac{100V + 100V + 100V}{3} = 100V$$
$$\sum_{i = 1}^{n}{\frac{I_{i}}{n} =}\frac{0,52A + 0,52A + 0,52A}{3} = 0,52A$$
U = Uf
$$I = \sqrt{3}I_{f}$$
$$I = \sqrt{3} \bullet 0,52A = 0,9A$$