A switch-mode dc-dc converter is operating at a switching frequency of 20 kHz, and Vd 5 150 V. The average current being drawn by the dc motor is 8.0 A. In the equivalent circuit of the dc motor, Ea = 100 V, Ra = 0:25 Ω, and La = 4 mH. (a) Plot the output current and calculate the peak-to-peak ripple, and (b) plot the current on the dc-side of the converter.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

To design a steam turbine to produce 12,000 hp power. a engineer comsiders using a steady state stean low st 1160fr and engineer considers using a steady state steam flow at 1160°r and 450 psia to drive this steam turbine. the exhaust of the steam is cooled by the lake (vacuum). heat losing to the surroundings is measured at a rate of 555.55 btu/s. (a) sketch the system with the given conditions. (b) neglecting kinetic and potential energy changes from inlet to exit, determine the volumetric flow rate of the steam at the inlet, (ft'/hr). must clearly show unit conversions at crtical terms.