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| Решение: | | Решение: |
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| $U=const$<br><br> | | $U=const$<br><br> |
| $i=\frac{U}{R}$$=\frac{US}{\rho l}$$=\frac{\lambda US}{l}$<br><br> | | $i=\frac{U}{R}$$=\frac{US}{\rho l}$$=\frac{\lambda US}{l}$<br><br> |
| Емкость сферического конденсатора:<br><br> | | Емкость сферического конденсатора:<br><br> |
| $С=4 \pi \varepsilon \varepsilon_0 \cdot \frac{R_1 R_2}{R_1 - R_2}$$\approx 4 \pi \varepsilon_0 \cdot \frac{R^2}{l}$$\approx \frac{\varepsilon_0 S}{l}$<br><br> | | $С=4 \pi \varepsilon \varepsilon_0 \cdot \frac{R_1 R_2}{R_1 - R_2}$$\approx 4 \pi \varepsilon_0 \cdot \frac{R^2}{l}$$\approx \frac{\varepsilon_0 S}{l}$<br><br> |
| $Q=iU=\frac{\lambda U^2 S}{l}$$=\frac{\lambda U^2 C}{\varepsilon_0}$ | | $Q=iU=\frac{\lambda U^2 S}{l}$$=\frac{\lambda U^2 C}{\varepsilon_0}$ |
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| Ответ: $Q=\frac{\lambda U^2 C}{\varepsilon_0}$ | | Ответ: $Q=\frac{\lambda U^2 C}{\varepsilon_0}$ |
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