Efisiensi transformator:

<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row eta equals cell P subscript s over P subscript p cross times 100 percent sign space space end cell row cell 85 percent sign end cell equals cell P subscript s over 750 cross times 100 percent sign space space end cell row cell P subscript s end cell equals cell space 637.5 space straight W space space end cell end table end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mtable columnspacing=¨0px¨ columnalign=¨right center left¨»«mtr»«mtd»«mi»§#951;«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfrac»«msub»«mi»P«/mi»«mi»s«/mi»«/msub»«msub»«mi»P«/mi»«mi»p«/mi»«/msub»«/mfrac»«mo»§#215;«/mo»«mn»100«/mn»«mo»%«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«/mtd»«/mtr»«mtr»«mtd»«mn»85«/mn»«mo»%«/mo»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfrac»«msub»«mi»P«/mi»«mi»s«/mi»«/msub»«mn»750«/mn»«/mfrac»«mo»§#215;«/mo»«mn»100«/mn»«mo»%«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«/mtd»«/mtr»«mtr»«mtd»«msub»«mi»P«/mi»«mi»s«/mi»«/msub»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mo»§#160;«/mo»«mn»637«/mn»«mo».«/mo»«mn»5«/mn»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»W«/mi»«mo»§#160;«/mo»«mo»§#160;«/mo»«/mtd»«/mtr»«/mtable»«/mstyle»«/math»" height="110" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -56px;" width="138" />

Jadi, daya skundernya adalah 637,5 Watt.

Efisiensi sebuah transformator 85 persen. Apabila data primernya 750 Watt. Berapa Watt daya sekunder nya?<img align="middle" alt="undefined" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mo»§#160;«/mo»«/math»" height="5" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAFCAYAAABirU3bAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAEx0lWhwAAAAxJREFUeNpjYKABAAAAVQAB8vOvGAAAAE50RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bW8+JiN4QTA7PC9tbz48L21hdGg+SHplFQAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -1px;" width="4" />&nbsp;

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Efisiensi sebuah transformator 85 persen. Apabila ...

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