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Zaporedno vezavo upora upornosti R = 2,7 kΩ in kondenzatorja kapacitivnosti C = 10,7 nF, priključimo (vklopimo stikalo S) na enosmerni napetostni vir U = 18,3 V.
Izračunaj čas t1 od vklopa stikala S do trenutka, ko je na kondenzatorju napetost uc(t1) = 2,9 V. Kondenzator je pred vklopom stikala prazen.
Odgovor podaj v μs.
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