Physics
WAEC 2019
If the efficiency of a transformer is 100%, which of the following equations would be correct?
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A.
N\(_p\)E\(_p\) = N\(_s\)E\(_s\)
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B.
N\(_s\)I\(_p\)= N\(_p\)I\(_s\)
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C.
N\(_s\)I\(_s\) = N\(_p\)I\(_p\)
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D.
I\(_p\)E\(_s\) = I\(_s\)E\(_p\)
Correct Answer: Option D
Explanation
For a transformer with 100% efficiency, the input power equals the output power:
E\(_p\)I\(_p\) = E\(_s\)I\(_s\)
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