- #1
Ivan Antunovic
- 111
- 4
Homework Statement
In the network of sinusoidal current , R2 = 10 ohm , X2 = -30*sqrt(3) ohm. Find the resistance R1 so that voltage U2 is in phase delay behind voltage U for angle alpha = - pi / 6.
Homework Equations
The Attempt at a Solution
Z2 = sqrt(R^2 + X2^2) = 20*sqrt(7) ohms
fi2 = arctg(X2/R2) = -79. 107 degrees
fi = 30 + fi2 = -49.107 degrees
the rest is in the picture below.
The problem is that this last equation can only give complex solutions and R1 should be in real domain.