In Problem 10.39, what percent reduction in the line current and total voltamperes is achieved in part (a)? What further reduction is achieved in part (b)?

Data from problem 10.39

A 4500-VA load at power factor 0.75 lagging is supplied by a 60-Hz source with effective voltage 240 V. Determine the parallel capacitance in microfarads necessary to improve the power factor to

(a) 0.90 lagging,

(b) 0.90 leading.