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sutekilady
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Transformer questions - primary, secondary, gaaaah!
Hello, I really need help with this. Much appreciated! Thank you so much in advance for any help!
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
Vs/Vp=Ns/Np
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.
Hello, I really need help with this. Much appreciated! Thank you so much in advance for any help!
Homework Statement
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
Homework Equations
Vs/Vp=Ns/Np
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.