(Solved): 3- The sinusoidal current source in the circuit shown in figure below produces the current Is=25cos ...

3- The sinusoidal current source in the circuit shown in figure below produces the current $$Is=25\cos 100000t\mathrm{A}$$. a) Construct the frequency-domain equivalent circuit. b) In the following circuit, connect impedance, $$Z=10\mathrm{J}?10\mathrm{J}$$ in parallel with other impedances, under this condition find voltage of the circuit.