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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.
Problem (a) Figure gives the basic circuit of the diode limiter. Assuming that the diodes are ideal sketch and annotate the waveforms of the input voltage vi(t) and the load
Figure shows the cross-section of an electrostatic problem with translational symmetry: a rectangular coaxial cable. The inner conductor is held at 10 volts and the outer conductor
Q. emf produced by windings? The time variation of emf for a single conductor corresponds to the spatial variation of air-gap flux density. By suitable winding design, the harm
Q. What is Ringer Circuit in telephone hand set? Purpose of the ringer is to alert destination party of incoming calls. Audible tone from the ringer should be load enough to be
why is delay line used in vertical deflection on systems of CRO?
What is polarisation? Explain. While a dielectric material is related an electric field the dipoles of the material find oriented in a certain direction under the effect of the
Open the GetSParameter schematic. You will need to modify the design to include the biasing components. (Even at this stage I would recommend the use of models of real resistors th
Types of High Voltage Distribution System A High Voltage Distribution System could be of the subsequent types: - Three phase Extension HT line from the primary substation a
1. Name the three parts of a programmable logic controller (PLC) and explain why the PLC is preferred by designers over electromechanical relays. 2. Medium-voltage circuit break
Q. A dc series motor operates at 750 r/min with a line current of 100 A from the 250-V mains. Its armature-circuit resistance is 0.15 and its series-field resistance is 0.1 . As
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