| 1 Parameterization is chosen: two unknown currents or one unknown potential. | 0.20 |
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| 2 The system of equation is written | 2 × 0.30 |
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3
Obtained that \[I_2 = U_0 \frac{\frac{1}{R_1 R_4}-\frac{1}{R_2R_3}}{\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+\frac{1}{R_4}}\] |
0.50 |
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4
Obtained that \[I_1 = U_0 \frac{\left( \frac{1}{R_1} + \frac{1}{R_2} \right) \left( \frac{1}{R_3} + \frac{1}{R_4} \right)}{\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+\frac{1}{R_4}}\] |
0.50 |
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| 5 Different permutations of the resistances are analyzed (at least two distinct arrangements are considered). | 0.60 |
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6
Found that \[R_1 = 1~\Omega \leftrightarrow R_4 = 4 ~\Omega \quad R_2 = 2~\Omega \leftrightarrow R_3 = 3~\Omega\] |
1.00 |
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| 7 \[I_1=4.8~\mathrm{A}\] | 0.30 |
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| 8 \[I_1=5.0~\mathrm{A}\] | 0.30 |
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