Question

In an ideal transformer, the voltage is stepped down from 11KV to 220V. If the primary current be 20 A the current in the secondary should be

• A. 5 kA
• B. 1 kA
• C. 0.5 kA
• D. 0.1 kA

Answer 1

The correct option is B 1 kA

Power in primary and secondary transformers should be same

$\Rightarrow V_1{I}_1=V_2{I}_2$

$\Rightarrow 11000\times 20=220\times I$

$\Rightarrow I=1kA$

Therefore option $B$ is correct