Two Transformers, voltage before and after on two different coils

[codytanner16]

Homework Statement

We have a transformer with the primary coil carries 120 V and the secondary coil having 6 V. If you change the second coil to have 8V, what is the voltage in the primary coil?

Homework Equations

My textbook does not have any equations that involve just the voltage of transformers.

I do have V₂=(N₂/N₁)V₁

Or is just a set up of proportions? Like V1/V2=V1/V2

The Attempt at a Solution

120/6=x/8

so x=160?

 

[Dick]

Homework Statement

We have a transformer with the primary coil carries 120 V and the secondary coil having 6 V. If you change the second coil to have 8V, what is the voltage in the primary coil?

Homework Equations

My textbook does not have any equations that involve just the voltage of transformers.

I do have V₂=(N₂/N₁)V₁

Or is just a set up of proportions? Like V1/V2=V1/V2

The Attempt at a Solution

120/6=x/8

so x=160?

Yes, I think that's the idea. It's not really changing the coil, it's changing the input voltage, but I don't know how else to answer it.