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Hello, I really need help with this. Much appreciated!!! Thank you so much in advance for any help!

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

A step-up transformer has exactly 100 turns in the primary and exactly 200 turns in the secondary. If the voltage in the primary is 100 V ± 2 %, what is the voltage in the secondary?

a. 200 V ± 4 V

b. 200 V ± 4 %

c. none of the other answers

d. 100 V ± 4 %

e. 200 V ± 2 V

2. Relevant equations

Vs/Vp=Ns/Np

3. The attempt at a solution

OK now here, I know the voltage should be 200V. But the uncertainty .... ? I really don't know where to even begin with that. I chose answer b. 200 V ± 4 %, and it was wrong.

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# Homework Help: Transformer questions - primary, secondary, gaaaah

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