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I have been having trouble calculating the value of the voltage supply. From what I have learned, to calculate the value, it is V= I x R. I have already calculated the value of R2 as the problem asks, but how do I find the voltage supply if I only know the resistane and the power being distributed to R2?
I tried using P= V^2 / R1 to try to find V, but it didn't work out for me:
V^2= 81 (18)= 1458
V= √1458
V= 38.18
The book says the answer is 27
I tried using P= V^2 / R1 to try to find V, but it didn't work out for me:
V^2= 81 (18)= 1458
V= √1458
V= 38.18
The book says the answer is 27
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