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Endless Exercises: DC Power Formulas, Level 2
Given the values shown in the middle column of this page, use the power formulas to determine the third value.
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 Given:
P = 4.9 mW
R = 68 kW

Find:

E = ________
Hint:
E = ÖPR
I = Ö(4.9 mW)(68 kW)

Answer:

E = 18.4 V


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