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# Complete the power triangle

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Join Date
Mar 2015
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11
Reputation ## Complete the power triangle

Complete the power triangle given 127.58 VAR and 150.11 VA

79.1 W, 58.2 PF

127.49 W, 31.79 PF

49.02 W, 31.79 PF

79.1 W, 49.02 PF

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I believe the correct answer should be 79.1 watts, 52.7 power factor. 2. Originally Posted by jfoster Complete the power triangle given 127.58 VAR and 150.11 VA

79.1 W, 58.2 PF

127.49 W, 31.79 PF

49.02 W, 31.79 PF

79.1 W, 49.02 PF

Mark For Later Review

I believe the correct answer should be 79.1 watts, 52.7 power factor.
You might want to check your work for the power factor portion, but
I think they shouldn't call it PF but the angle since cos of theta is 0 - 1, not 58.2
answer I would select is 79.1 W, 58.2 PF

P=sqrt((150.11^(2))-(127.8^(2)))= 79.1 W
sin^(-1)(127.58/150.11) = 58.2 degrees

PF = cos(58.2) = 0.5269 = 0.53 3. Originally Posted by Kalbi_Rob You might want to check your work for the power factor portion, but
I think they shouldn't call it PF but the angle since cos of theta is 0 - 1, not 58.2
answer I would select is 79.1 W, 58.2 PF

P=sqrt((150.11^(2))-(127.8^(2)))= 79.1 W
sin^(-1)(127.58/150.11) = 58.2 degrees

PF = cos(58.2) = 0.5269 = 0.53
Question has been updated to reflect the angle rather than PF. electrical calculations, electrical theory, neta level 2, neta level 3, power factor  