Question

In a step up transformer, primary and secondary currents are $500A$ and $100A$. The ratio of the number of turns in the respective coil is

• A. $1:5$
• B. $5:1$
• C. $25:1$
• D. $1:25$

Answer 1

Answer: (A)

$1:5$

$i_1{n}_1=i_2{n}_2$

$\frac{n_1}{n_2}=\frac{i_2}{i_1}$
$=\frac{100}{500}=\frac{1}{5}$