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Physics
Physics
Problem
The primary winding of a transformer draws a current of
4.0
A
4.0\,\text{A}
4.0
A
at
240
V
240\,\text{V}
240
V
. The secondary delivers
12.0
A
12.0\,\text{A}
12.0
A
at
78
V
78\,\text{V}
78
V
. Calculate the efficiency of the transformer to the nearest whole percent.
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