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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.
Lenz's law states: 'The direction of an induced e.m.f. is always like that it tends to set up a current opposing the motion or the change of flux responsible for inducing that
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I am getting humming noice in speaker when I connect to laptop on ac when I put it on dc (battery) it''s dispear . Please help
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how can optimized the system through the matlab software?
Construction of inductor An inductor is usually constructed as a coil of conducting material, typically opper wire, wrapped around a core either of air or ferrous material.
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Question: a). Draw the energy diagram of a pn junction: (i) at thermal equilibrium, (ii) when a forward bias with magnitude half the built in potential (V = φk/2) is applie
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