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Questions:
(a) Suppose a 100 kHz switching power supply.
(i) Evaluate the magnitude of the wave impedance of the radiated field of a very short wire in the switching power supply at a distance of 15 cm if it carries the fundamental frequency of the switcher of 100 kHz.
(ii) Evaluate the magnitude of the wave impedance of the radiated field of the transformer in switching power supply at a distance of 15 cm.
(b) Model the shield on a 2-m personal computer printer cable as a monopole antenna (with the metallic structure of the computer as the ground plane) and estimate the maximum radiated emissions at a measurement distance of 3 m if the voltage of the shield attachment point with respect to the metallic structure is a 1-mV, 37.5-MHz signal.
(c) Check a typical personal computer having a metallic enclosure and list the "penetrations" that allow signals from the inside to pass to the outside, avoiding the shielding of the metallic enclosure.
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Low Investments in Transmission and Distribution System The investment on T&D system in our country has commonly been lower than that on generation. It is hugely believed in
For the motor speci?ed in figure, compute the following: (a) The load component I' 2 of the stator current, the internal torque T, and the internal power P m for a slip of 0.
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FIGURE shows a pneumatic circuit diagram used for air supply and exhaust in an automatic control system. (a) Name all symbols (including pipelines) used in the system. (b) N
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what is the method to do this project and what material used for?
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