Page 347 - Basic Electrical Engineering

current,

since the same current will flow through Z ,
2

= 17.45(cos15.4° − j sin15.4°)

= 17.45 × 0.964 − j 17.45 × 0.2656

= 16.82 − j4.6 Ω

Note that the impedance of an R–L circuit is R + j X and impedance of an
L
R–C circuit is R – jX . Since, Z = 16.82 – j4.63, it must be an R–C circuit.
C
Thus, impedance coil Z is written as
2

Z = R − jX c
2
where, R = 16.82 Ω

and X = 4.63 Ω
C

Substituting