Question

Answer 1

Bài 4:

Ta có: \(\dfrac{U1}{U2}=\dfrac{I1}{I2}\Rightarrow I2=\dfrac{U2.I1}{U1}=\dfrac{60.0,75}{40}=1,125A\)

Bài 5:

a. \(R=R1+R2=35+15=50\Omega\)

b. \(I=U:R=90:40=1,8A\)

c. \(I=I1=I2=1,8A\left(R1ntR2\right)\)

\(\left\{{}\begin{matrix}U1=R1.I1=35.1,8=63V\\U2=R2.I2=15.1,8=27V\end{matrix}\right.\)

Answer 2

Bài 6:

a. \(R=U:I=6:0,5=12\Omega\)

b. \(R2=R-R1=12-5=7\Omega\)

c. \(I=I1=I2=0,5A\left(R1ntR2\right)\)

\(U2=R2.I2=7.0,5=3,5V\)