1) Cho mach dao dong LC, biet C = 4μF, L = 0,4mH. Tu duoc tich dien den U0 = 12V
a) Mach dao dong thu (phat) buoc song bang bao nhieu
b) Tai thoi diem Wd = WL thi u = ?
d) Tai thoi diem Wd = 3WL thi i?
h) De mach thu duoc buoc song tang gap 4 lan thi mac them tu C1 voi C cho biet cach mac. Tinh C1