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1. The problem statement, all variables and given/known data

A load resistor is placed across the secondary terminals of a step-down transformer with a turn ratio of 4:1. If the primary voltage and current are 120V and 1A., What will be the secondary voltage and current? Assume 100% efficiency.

2. Relevant equations

Ns/Np = Vs/Vp = Ip/Is

3. The attempt at a solution

Ns should be 4,,right??

but If Ns = 4..then, I don't get the right answer...

why is Np 4?? Np is primary isnt it??

The answers were 30v and 4A.

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# Homework Help: Secondary voltage and current?

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