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I need help with the following problem: Given electric circuit of sinusoidal current, with the following data: Z3=200(3-j4)ohm Z4=100(3+j20)ohm Z5=100(3+j4)ohm Z=100(2+j5)ohm Ig2=-10(2-j)mA After the switch is closed, the increment of voltage U12 is given as delta(U12)=(4+j3)V. Find complex apparent power of Ig2 after the switch is closed. Note: Ig1,E2,E6,Z1,Z2 are not given.

I need help with the following problem:
 
Given electric circuit of sinusoidal current, with the following data:
Z3=200(3-j4)ohm
Z4=100(3+j20)ohm
Z5=100(3+j4)ohm
Z=100(2+j5)ohm
Ig2=-10(2-j)mA
 
After the switch is closed, the increment of voltage U12 is given as delta(U12)=(4+j3)V.
 
Find complex apparent power of Ig2 after the switch is closed.
 
Note: Ig1,E2,E6,Z1,Z2 are not given.

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