Respuesta :

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

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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

[tex]\phi _p = N_p \phi_0[/tex]

[tex]\phi_s = N_s\phi_0[/tex]

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

[tex]E_s = N_s\frac{d\phi_0}{dt}[/tex]

[tex]E_p = N_pfrac{d\phi_0}{dt}[/tex]

now we have

[tex]\frac{E_s}{E_p} = \frac{N_s}{N_p}[/tex]

so we can say that

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

[tex]E_s < E_p[/tex]

so we will have

[tex]N_s < N_p[/tex]

so turns will be more in

A) Primary coil

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