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Unformatted text preview: power absorbed by a 2-Ω resistor when the voltage is applied across the resistor. Figure 11.59 (Q9) 11.40 A load consisting of induction motors is drawing 80 kW from a 220-V, 60-Hz power line at a pf of 0.72 lagging. Find the capacitance of a capacitor required to raise the pf to 0.92. (Q10) 11.44 Find the complex power delivered by v s to the network in Fig. 11.69. Let v s = 100 cos 2000 t V. Figure 11.69 (Q11) 11.54 For the network in Fig. 11.73, find the complex power absorbed by each element. Figure 11.73 (Q12) 11.73 A 240-V rms 60-Hz supply serves a load that is 10 kW (resistive), 15 kVAR (capacitive), and 22 kVAR (inductive). Find: (a) the apparent power (b) the current drawn from the supply (c) the kVAR rating and capacitance required to improve the power factor to 0.96 lagging (d) the current drawn from the supply under the new power-factor conditions...
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This note was uploaded on 10/26/2009 for the course EE 411 taught by Professor Lee during the Spring '07 term at University of Texas.
- Spring '07