The self-inductance of two coils of a transformer is $20 \mathrm{mH}$ and $30 \mathrm{mH}$. What is the…
The self-inductance of two coils of a transformer is $20 \mathrm{mH}$ and $30 \mathrm{mH}$. What is the resistance between them?
0
$1.5 \Omega$
$600 \Omega$
Infinite
Solution
Transformers are built in such a way that both primary and secondary coils are well insulated from each other. Hence, resistance between them is considered to be infinite.