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Transformers

How are the e...

Question

How are the e.m.f. in the primary and secondary coils of a transformer related to the number of turns in these coils?

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Solution

The relation is the following:

Np = Number of turns in the primary winding

Ns = Number of turns in the secondary winding

Ep = EMF in the primary winding

Es = Induced EMF in the secondary winding.

or $\frac{n u m b e r o f t u r n s i n p r i m a r y c o i l}{n u m b e r o f t u r n s i n s e c o n d a r y c o i l}$ = $\frac{e m f i n p r i m a r y c o i l}{e m f i n s e c o n d a r y c o i l}$

It means that if you increase the number of turns in the secondary coil the EMF in the secondary coil will increase and vice versa.

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