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A 5000-VA 480/120-V conventional transformer is to be used to supply power from a 600-V source to a 120-V load. Consider the transformer to be ideal, and assume that all insulation can handle 600 V.
(a) Sketch the transformer connection that will do the required job.
(b) Find the kilovoltampere rating of the transformer in the configuration.
(c) Find the maximum primary and secondary currents under these conditions.
Design a buffer circuit to measure the voltage on a small capacitor using a bipolar transistor and a DVM. Design a similar circuitusing a FET transistor. Which is better and why
A robot arm must be able to extend 24 in. horizontally in 2 s while carrying a load of 10 lb. How much force is required, assuming the arm is accelerating all the way
a) Design a circuit with a single opamp to realize V0=V1-4V2, where V1 and V2 are two input voltages. b) Select the resistor values so that no more than .25W is dissipated in any resistor when the input voltages are no larger than 10V
Compare the parameters obtained to the tabulated values - The load on the line is 70 MW at 100% power factor. Use attached Tables A3 to A5 to determine.
A semiconductor, in thermal equilibrium, has a hole concentration of p0 = 2x10^16 cm^-3. The minority carrier life time = 3x10^-7 s. (Assume, ni = 10^10 cm^-3)
Given two NMOS FETs having (kn'/2)(W/L) = (3 KW)^-1 and Vt = 3V. Using a single 10V dc power supply, design a differential pair amplifier having 1mA bias current in each transistor. What is its maximum gain for linear operation (balanced input, ba..
A temperature sensor produces 10 mV for each degree Fahrenheit. Determine the error in temperature reading if 20 mV of noise is added to the sensor output signal when the temperature is 70 degrees.
Consider a virtual memory system that can address a total of 232 bytes. You have unlimited hard drive space, but are limited to only 8 MB of semiconductor (physical) memory. Assume that virtual and physical pages are each 4 KB in size.
A long hallway has three doors, one at each end and one in the middle. A switch is located at each door to operate the incandescent lights along the hallway. Label the switches A,B, and C. Design a logic network to control the lights.
Figure 1 shows the network diagram of a 132kV power system. The network has three buses and two generating units. The loads of (l.O+jO.35) pu and (3.2+J1.2) pu are connected at bus 2 and 3 respectively. The generator connected at bus 2 injects 1.2..
A long-haul optical transmission link is to be designed under the design constraints that (i) the radius of the core is to be no smaller than 4 ?m, and (ii) a numerical aperture (NA) of at least 0.12 is needed to focus optical energy into the fibe..
b)If the calculator produces three digit random numbers that are uniformly distributed between 0.000 and 0.999, find the variance of the sample mean. c) How large should the sample size be in order to obtain a sample mean whose standard deviation i..
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