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1 | P a g e Misr university for science & technology ECE 212 , Electric Circuit II Electrical power & machine department Assignment ( 7 ) 2 pages Spring 2014-2015 Due date : Instructor Prof. Soliman A. Soliman 1- An 880-VA, 220-V, 50-Hz load has a power factor of 0.8 lagging. What value of parallel capacitance will correct the load power factor to unity? 2- An 40-kW induction motor, with a lagging power factor of 0.76, is supplied by a 120- V rms 60-Hz sinusoidal voltage source. Find the capacitance needed in parallel with the motor to raise the power factor to: (a) 0.9 lagging. (b) 1.0. 3- A 120-V rms 60-Hz source supplies two loads connected in parallel, as shown in Fig. below: (a) Find the power factor of the parallel combination. (b) Calculate the value of the capacitance connected in parallel that will raise the

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