Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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The numerical values for the currents and voltages in the circuit in Fig P1.29 are given in Table P1.29. Find the total power developed in the circuit.
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- An energy-efficient lightbulb, taking in 25.0 W of power, can produce the same level of brightness as a conventional lightbulb operating at power 100 W. The lifetime of the energy-efficient bulb is 10 000 h and its purchase price is $4.90, whereas the conventional bulb has lifetime 750 h and costs $0.58 per bulb. Determine the total savings obtained by using one energy-efficient bulb over its lifetime as opposed to using conventional bulbs over the same time period. Assume an energy cost of $0.20 per kilowatt-hour.arrow_forwardI need help with problem 1.30.arrow_forwardThe numerical values for the currents and voltages in the circuit in Fig. P1.26 are given in Table P1.26. Find the total power developed in the circuit. Figure P1.26 + Va in a + Un in b is + Ve Ve e f d + Pa TABLE P1.26 Element Voltage (kV) Current (mA) 150 0.6 150 -1.4 100 -0.8 d 250 -0.8 300 -2.0 f - 300 1.2 +arrow_forward
- 1.15 Through repeated application of Thévenin's theorem, find the Thévenin equivalent of the circuit in Fig. P1.15 between node 4 and ground, and hence find the current that flows through a load resistance of 3 k2 connected between che node 4 and ground. ple 1 20 k2 2 20 k2 3 20 k2 4 ide est pe? 10 V 20 k2 20 k2 20 k2 er? che wo Ive Figure P1.15 It: *** = very challenging: D = design problemarrow_forwardAn energy saving project has an initial investment of Rs. 12,00,000 and its useful life is 10 years. The salvage value of the plant at the end of its useful life is Rs. 2,00,000 is . The annual income from the project is Rs. 3,50,000 and the operating cost of the project is Rs. 1,00,000 is . Then find (1) the net annual income of the investment and (2) the pay-back period (3) the return on investment (ROI).arrow_forwardSolve the following problems with complete solutions and units using 2 decimal digits: The resistance of a given e electric device is 46 Ω at 25°C. If the temperature coefficient of resistance of the material is 0.00454 at 20°C, determine the temperature of the device when its resistance is 92 Ωarrow_forward
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