Tīpoka ki ngā ihirangi matua
Whakaoti mō V
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Whakaoti mō E
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Tohaina

hV=E
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
\frac{hV}{h}=\frac{E}{h}
Whakawehea ngā taha e rua ki te h.
V=\frac{E}{h}
Mā te whakawehe ki te h ka wetekia te whakareanga ki te h.