4. A certain industrial load has an impedance of 0.6 30° at a frequency of 60 Hz. What capacitor connected in parallel with this load causes the angle of the total impedance to decrease to 15° ? Also if the load voltage is 120 V, what is the decrease in line current produced by adding the capacitor ? A. 1.18 mF, 20.7 A B. 1.81 mF, 20.7 A C. 8.11 mF, 20.7 A D. 1.81 mF, 70.2 A E. NOTA

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Superposition Theorem

The superposition theorem is applied to linear systems. For such systems, the output from two different inputs equals the sum of the outputs from each input separately. On applying this theorem many times we get the output from any number of inputs equal to the sum of the outputs from the individual inputs separately.