Question

From the following circuit I get that the equivalent impedance is Z = 25 - j150 which in polar form is a vector with magnitude 152.07 at an angle of -80.53 (when the angular frequency is 500) but the answer is a vector with magnitude 158 and angle of −71.57. Have I done something wrong or is the answer incorrect?

Answer 1

w= 500 Z= (25-150j) |Z|= 152.069063257 phase= -80.537677792
w= 1000 Z= (25+0j) |Z|= 25.0 phase= 0.0
w= 1500 Z= (25+83.3333333333j) |Z|= 87.0025542409 phase= 73.300755766
w= 2000 Z= (25+150j) |Z|= 152.069063257 phase= 80.537677792

Answer 2

`IOW , i think i agree...:p