Question

\(\frac{u1}{u2}=\frac{n1}{n2}=>u2=\frac{n2.u2}{n1}=\frac{3500.110}{1500}=\frac{770}{3}V\)

\(\frac{u1}{u2}=\frac{n1}{n'2}=>n'2=\frac{u'2.n1}{u1}=\frac{220.1500}{110}=3000vòng\)