Đặt điện áp $u=U_{0} \cos \omega t$ vào hai đầu đo...
Câu hỏi: Đặt điện áp $u=U_{0} \cos \omega t$ vào hai đầu đoạn mạch $A B$ như hình bên. Trong đó, cuộn cảm thuần có độ tự cảm $L$; tụ điện có điện dung $C ; X$ là đoạn mạch chứa các phần từ có $R_{1}, L_{1}, C_{1}$ mắc nối tiếp. Biết $2 \omega^{2} L C=1,$ các điện áp hiệu dụng: $U_{{AN}}=120 {~V} ; U_{{MB}}=90 {~V}$, góc lệch pha giữa $u_{{AN}}$ và $u_{{MB}}$ là $\frac{5 \pi}{12} .$ Hệ số công suất của X là
![Đặt điện áp u=U0 cos omega t vào hai đầu đoạn mạch A B như hình bên. Trong đó, hình ảnh](data:image/jpeg;base64,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)
A. 0,25
B. 0,31
C. 0,87
D. 0,71
Câu hỏi trên thuộc đề trắc nghiệm
Đề minh họa tốt nghiệp THPT 2021 môn Lý có đáp án chi tiết từng câu