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Title: The potential difference across a circuit is given by the complex number V=5+j12 volts? Post by: rjcool123 on Sep 5, 2012 The current is given by the complex number I=9<21 degrees amperes.
Calculate the angle between V and I The power given P=(V)(I)cosx watts, where V and I are magnitudes and x is the angle between V and I Can some one help me with this question!! Please....... Title: The potential difference across a circuit is given by the complex number V=5+j12 volts? Post by: rkbrookover on Sep 5, 2012 V = ?(5² + 12²)
I = 9 <21 deg. x = <67.38 - <21 = 46.38 deg. P = VI cosx = 13*9 cos(46.38) = (117)0.68987 = 80.7 W Title: The potential difference across a circuit is given by the complex number V=5+j12 volts? Post by: JulieA on Sep 5, 2012 V = ?(5^2 + 12^2) at an angle of inverse tan (12/5)
the ?169 = 13 and the inverse tan of 2.5 = 67.38° V = 5 + j12 = 13 < 67.38° volts I = 9 < 21° amperes the angle is 46.38° P = 13*9 cos 46.38° 1P = 117 cos 46.38° = 80.71 watts since the cos 46.38° = 0.6899 answer P = 80.71 watts |