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Electrical Fundamentals
1. An aircraft company has decided to replace the copper cables to the main aircraft generators onboard it's Boeing 747s with aluminium cables that are capable of carrying the same current.
a. Describe the effects on the cable with the aircraft at sea level compared to 35,000 feet. Like coefficient of expansion at sea level and on 35,000 feet, resistivity.
2. A parallel plate capacitor was originally constructed using air as the dielectric. For another application, we need to change the dielectric to Mica.
a. Describe fully how this change of dielectric material has affected the capacitor in ALL respects.
Find the Thévenin equivalent for the attached circuit and use this to calculate the current in the load. Circuit information:- Load consists
AC and DC distribution onboard ships
Q. A 10-kW, 230-V shunt generator, with an armature-circuit resistance of 0.1 and a field- circuit resistance of 230 , delivers full load at rated voltage and 1000 r/min. If the
Using the audiorecorder() function in MATLAB, make a recording of your voice. Use a sample rate of 8kHz, 16 bits per sample, and aim to record around 2 seconds worth. Quantize th
Buck Converter In buck converters the output voltage is always less than the input voltage. The basic circuit of buck converter is shown in figure. The operation of th
.coments on the limitation of the superposition theorem
Q. Calculate the diameter of an air-filled circular waveguide? Unlike transmission lines, which operate at any frequency up to a cutoff value, waveguides have both upper and lo
A 440v 4-pole dc generator takes an armature current of 50A when rotating at 626 rpm. the armature circuit resistance is 0.25 ohms. determine the generated emf?
Practical application of rc coupled amplifer
Calculate the resistance of a 2 km length of aluminium overhead power cable if the cross-sectional area of the cable is 100 mm 2 . Take the resistivity of aluminium to be 0.03x10 -
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