What is the impedance of the 10nF capacitor a j103 b j103

What is the impedance of the 10nF capacitor?  

	a.	-j10-3 ( )
	b.	j10-3 ( )
	c.	-j103 ( )
	d.	j103 ( )

Consider the network shown below. Assume vit) 10sin(10Pt+45°) 20 k 1 10 ix v(t)

Solution

Impedance of the 10nF capacitor is given by Zc= -jXc=-j*(1/wC)=-j*1/(10^5*10*10^-9)=-j*10^3 ohm. so, answer is option\"C\"