Найти:С-?,U1-5=?,q1-5=?
решение
1/C23 = 1/C2 + 1/C3 =1/4 + 1/3 = 7/12
C23 = 12/7 мкФ
C123 = C1+C23 =4 +12/7 = 40/7 мкФ
1/ C12345 = 1/C123 + 1/C4 + 1/C5 = 7/40 +1/8+1/1/4 =
= (7+5+10) / 40 = 22/40 = 11.20
С = С12345 = 20/11 Ф = 1,82 мкФ
Q = CU = 20/11 * 60 = 1200/11 =109 мкКл
Q = Q4 = Q5 = Q123
U1 = U123 = Q123/C123 = (1200/11) / (40/7) =210/11 = 19 В
q1 = C1*U1 = 4*19 = 76 мкКл