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A 10kVA, 200/400V 50Hz single-phase transformer gave the following test results. O/C test: 200V, 1.3A, 120W, on l.v. side. S/C test: 22V, 30A, 200W on h.v. side. (a) Calculate the magnetizing current and the component corresponding to core loss at normal frequency and voltage. (b) Calculate the magnetizing branch impedances. (c) Find the percentage regulation when supplying full load at 0.8 p.f. leading. Determine the load which gives maximum efficiency, and find the value of this efficiency at unity power factor.
How much hydrogen would be needed to give the car a range of 300 miles if the source of electricity is an on-board fuel cell with an efficiency that is 50% of the ideal?
Four frequencies are applied at the input of a non-linear amplifier. Write down all of the frequency components at the output of the non-linear device. Write down only the first three harmonics. Frequencies of 1205Khz, 1200Khz, 1195Khz
Design a DC power supply that provides -95v +/- 5v to a 2 amp load (energy absorber). The input source is a 100 volt peak sinusoid, 60 Hz. You may use any basic circuit element. State the values of all circuit elements (in ohms, farads, etc).
a) Draw the state diagram b) Draw the schematic for the logic to implement this circuit using Inverters, AND gates, OR gates and D flip flops. Use the reverse side and additional sheets if needed.
A Si sample is uniformly doped with phosphorus at 5 E 16 cm^-3. We make a p-n junction by implanting boron atoms into the surface layer. The implanted depth is 0.15 µm. What should the surface concentration of the boron implant
By that I mean, how does IM/IT help KL carry out day-to-day operations and transacting, how does it aid management processes, and does it enable KL product and service innovation?
A stream can represent many different kinds of sources and destinations, including disk files, devices, other programs, and memory arrays. Discuss how to use the different data stream classes to move data to/from files.
Rain affects the downlink from the satellite and the overall CNR ratio in the receiver falls by 6.0 dB to 13.0 dB. What is the bit error rate and the time between errors now?
(a) Find the maxterm expression for F. Express your answer both in decimal and algebraic form. (b) Use a Karnaugh map to find the minimum sum-of-products form for F'. (c) Find the minimum product-of-sums for F.
8. What is Mac OS X's present day file system A) Macintosh Filing System (MFS) B) Hierarchical Filing System (HFS) C) Hierarchical Filing System Extended (HFS+) D) Extended File System (EXT) Th..
a) Describe the components and variables of the biological control apparatus involved in walking toward an object that can be seen on the horizon b) Why is walking a closed-loop operation
(a) Convert the expression for f(x, y, z) = fm(1, 3, 7) from minterm list from to maxterm list form. (b) Convert the expression for f(a, b, c, d) = fM(0, 1, 2, 3, 4, 6, 12) from maxterm list from to minterm list form.
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