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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.
Q. (a) Consider a diode circuit with RC load as shown in Figure. With the switch closed at t = 0 and with the initial condition at t = 0 that vC = 0, obtain the functional forms of
decimal to BCD code encoder active low
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List the addressing modes supported by 8051. 1. Register addressing 2. Direct addressing 3. Register indirect addressing 4. Immediate addressing 5.Register addres
Q. What are the advantages of the n-channel MOSFET over the p-channel? The main advantage of the n-channel MOSFET over the p-channel is due to the fact that charge carriers in
explain a basic measurement system
barrier voltage at pn junction
Currents induced in armature conductors of a d.c. generator are alternating. To make their flow unidirectional in the external circuit, we need a commutator. Moreover, these curren
Mutual inductance and coefficient of coupling: The equivalent inductance of two series connected coil (with mutual inductance among them) is 0.8 or 0.2 Henry based on the rela
a. Describe what you understand by 'offset voltage' and 'offset current' of op-amp. Discuss with a neat circuit diagram the method used for minimizing offset voltage and offset cu
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