Two impedances Z1 and Z2 when connected separately across a 230−V,50−Hz supply consumed powers 300 W and 150 W at power factors of 0.4 lagging and 0.7 leading respectively. If these impedances are now connected in series across the same supply, find: (i) Total power absorbed and overall p.f. (ii) The value of the impedance to be added in series so as to raise the overall p.f. to unity. (iii) Explain and evaluate the operation of the circuit with different conditions.P1=. 300w P2=. 150 w
