Ta có: \(\dfrac{U_1}{U_2}=\dfrac{N_1}{N_2}\Rightarrow\dfrac{U_1}{200}=\dfrac{210000}{100}\)
\(\Rightarrow U_1=420000\) vòng
Ta có :
\(\dfrac{N1}{N2}=\dfrac{U1}{U2}\)
=> \(U2=\dfrac{U1.N2}{N1}=\dfrac{200.210000}{100}=420000\left(V\right)\)
Sửa lại như bạn nói :
n1 = 100
n2 = 20000
u1 = 200
u2 = ?
Ta có :
\(\dfrac{n1}{n2}=\dfrac{U1}{U2}\Rightarrow U2=\dfrac{U1.n2}{n1}=\dfrac{200.20000}{100}=40000\left(V\right)\)