Chapter 7
Exercise 17:
Hint:
The impedance of the circuit is (20 - j 26.5) ohm. Find the current and then the power quantities.

Ans:

Exercise 25:
Hint:
Find the reactive power that needs to be corrected and determine the capacitive reactance that is needed to balance it.

Ans:
C = 53 uF. [Updated - please see detailed solution!]

Chapter 4
Exercise 57:
Hint:
Mesh 1: (R₁ - j X_C) i₁ - (-j X_C) i₂ = 15.

Ans:
i₁ = 3.8 mA \/ 46.6 deg
i₂ = 19.6 mA \/ -83.2 deg