Question

A step-down transformer has more loops on which coil?

Answer 1

A step-down transformer has more loops in :  A. Primary coil

Primary coil refers to the coil to which alternating voltage is supplied. It's usually connected to the AC supply

hope this helps

Answer 2

Answer:

A). Primary coil

Explanation:

As we know that in an ideal transformer the flux linked with primary coil and secondary coil for each turn must be same

so we can say that

$\phi _p = N_p \phi_0$

$\phi_s = N_s\phi_0$

so as per faraday's law we can say that two EMF is given as

$E_s = N_s\frac{d\phi_0}{dt}$

$E_p = N_pfrac{d\phi_0}{dt}$

now we have

$\frac{E_s}{E_p} = \frac{N_s}{N_p}$

so we can say that

for step down transformer the output voltage is less than the input transformer

$E_s < E_p$

so we will have

$N_s < N_p$

so turns will be more in

A) Primary coil