
Chương 3
Authored by Phước Sang
Physics
12th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Điện áp (V) có giá trị hiệu dụng bằng
A. 141 V
B. 200 V
C. 100 V
D. 282 V
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cường độ dòng điện có pha ban đầu là
rad
rad
rad
rad
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Điện áp (V) có giá trị cực đại bằng
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho một đoạn mạch RC có R = 50Ω ; C = . Đặt vào hai đầu đoạn mạch một điện áp
u = 100cos(100 πt – π/4) (V). Biểu thức cường độ dòng điện qua đoạn mạch là:
i = cos(100πt – π/2)(A)
i = 2cos(100 πt + π/4)(A)
i = cos (100 πt)(A)
i = 2cos(100 πt)(A)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công suất của mạch điện xoay chiều
P = U.I.cosφ
P = U.I.sinφ
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mạch điện xoay chiều cộng hưởng khi
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(TH) Dòng điện chạy qua đoạn mạch xoay chiều có dạng i = 2cos(120πt + π/6) A. Tần số của dòng điện là
50 Hz.
60 Hz.
100π Hz.
120π Hz.
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