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![](https://rs.olm.vn/images/avt/0.png?1311)
Ban đầu chưa hoán đổi: \(R_X//R_V\)
\(\Rightarrow U=U_V=U_X=3V\)
\(I_A=I_m=12mA=0,012A\)
\(\Rightarrow R_{tđ}=\dfrac{R_X\cdot R_V}{R_X+R_V}=\dfrac{U}{I}=\dfrac{3}{0,012}=250\) \(\left(1\right)\)
Khi hoán đổi mạch mới là: \(R_VntR_X\)
\(\Rightarrow R_{tđ}=R_X+R_V=\dfrac{U}{I}=\dfrac{3}{0,004}=750\Omega\)
Như vậy: \(\left(1\right)\Rightarrow R_X\cdot R_V=187500\)
Áp dụng công thức: \(R^2-S\cdot R+P=0\) với \(\left\{{}\begin{matrix}S=R_X+R_V\\P=R_X\cdot R_V\end{matrix}\right.\)
Khi đó: \(R^2-750R+187500=0\)
![](https://rs.olm.vn/images/avt/0.png?1311)
b) Do RA rất nhỏ nên mạch gồm [(R1// R3)nt R2] // R4
\(R_{13}=\dfrac{4.4}{8}=2\left(\Omega\right)\)
\(R_{123}=4\left(\Omega\right)\)
\(\Rightarrow I_2=\dfrac{6}{4}=1,5\left(A\right)\)
U13 = I2. R13 = 1,5. 2 = 3V
\(I_1=\dfrac{U_{13}}{R_1}=\dfrac{3}{4}=0,75\left(A\right)\)
\(I_4=\dfrac{U}{R_4}=\dfrac{6}{4}=1,5\left(A\right)\)
\(I=I_2+I_4=3\left(A\right)\)
Số chỉ của ampe kế là: Ia = I - I1 = 3 - 0,75 = 2,25 (A)
a,Do Rv rất lớn nên vẽ lại mạch [(R3 nt R4)// R2] nt R1
Ta có: R34 = R3 + R4 = 4 + 4 = 8(ôm)
\(R_{CB}=\dfrac{R_{34}R_2}{R_{34}+R_2}=1,6\left(\Omega\right)\)
Rtđ = RCB + R1 = 1,6 + 4 = 5,6 (ôm)
\(\Rightarrow I=I_1=\dfrac{6}{R_{td}}=\dfrac{6}{5,6}=\dfrac{15}{14}\left(A\right)\)
UCB = I. RCB = 15/14. 1,6 \(\approx\) 1,72 (V)
Cường độ dòng điện qua R3 và R4
\(I_{34}=\dfrac{U_{CB}}{R_{34}}=\dfrac{1,72}{8}=0,215\left(A\right)\)
Số chỉ của vôn kế: UAD = UAC + UCD = IR1 + I34R3
= 1,07. 4 + 0,215.4= 5,14 (V)
![](https://rs.olm.vn/images/avt/0.png?1311)
Để vẽ sơ đồ mạch điện như yêu cầu, ta có thể vẽ như sau:
_______ _______ | | | | ---| Pin |----+----| Pin |--- |_______| | |_______| | _______ | | | | --| Đèn |-----+ |_______| | _______ | | | | --| Đèn |-----+ |_______| | _______ | | | | --| Công |-----+ | tắc | |_______| | _______ | | | | --| Ampe |-----+ | kế | |_______| | _______ | | | | --| Vôn |-----+ | kế | |_______| | _______ | | | | --| Ampe |-----+ | kế | |_______| | _______ | | | | --| Ampe |-----+ | kế | |_______|a. Để xác định chiều dòng điện, cực (+) và (-) của pin, ta có thể nhìn vào biểu đồ và xác định chiều dòng điện từ pin đến đèn. Cực (+) của pin được kết nối với cực (+) của đèn, cực (-) của pin được kết nối với cực (-) của đèn. Với công tắc được đặt ở vị trí mở, dòng điện sẽ chảy từ pin qua đèn và trở lại pin.
b. Vôn kế chỉ 6V, do đó hiệu điện thế của hai bóng đèn cũng là 6V.
c. Ampe kế A chỉ 1,5A, ampe kế Ai chỉ 0,6A. Để tính số chỉ ampe kế Az, ta có thể sử dụng công thức:
Az = A - Ai = 1,5A - 0,6A = 0,9A
d. Nếu mắc nối tiếp 2 đèn vào nguồn 12V, dòng điện sẽ chia đều qua 2 đèn. Vì vậy, dòng điện qua mỗi đèn sẽ là 12V/2 = 6V. Với hiệu điện thế của đèn là 6V, 2 đèn sẽ sáng bình thường.
![](https://rs.olm.vn/images/avt/0.png?1311)
Vôn kế đo hiệu điện thế giữa hai đầu điện trở R → U V = U R = 6V
Biến trở và R ghép nối tiếp nên I = I A = I b = I R = 0,5A
và U b + U R = U ↔ U b = U - U R = 12 – 6 = 6V
Điện trở của biến trở là:
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1:
Điện trở: \(R=U:I=12:0,1=120\Omega\)
Tiết diện của dây dẫn MN: \(R=p\dfrac{l}{S}\Rightarrow S=\dfrac{p.l}{R}=\dfrac{0,4.10^{-5}.12}{120}=4.10^{-7}m^2\)
Bài 2:
Điện trở định mức của biến trở con chạy là 55\(\Omega\)
Cường độ dòng điện định mức của biến trở con chạy là 2A.
Chiều dài dây dẫn: \(R=p\dfrac{l}{S}\Rightarrow l=\dfrac{R.S}{p}=\dfrac{55.0,5.10^{-6}}{0,4.10^{-6}}=68,75m\)
a, muốn đo cường độ dòng điện qua 1 bóng đèn ta cần dụng cụ: Ampe kế
b,
c,
,![](data:image/png;base64,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)
*áp dụng \(\dfrac{U1}{U2}=\dfrac{I1}{I2}< =>\dfrac{12}{12.2,5}=\dfrac{4}{I2}=>I2=10A\)