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1. What is a transformer? Explain the functions it fulfils as an element of a power system.
2. Differentiate between core and shell-type transformers.
3. Explain briefly the ideal transformer as a circuit element. Can voltage and current ratios be adjusted independently?
4. Explain the operation and application of the impedance transforming property of an ideal transformer.
Introduce Lagrange multipliers for each of the two constraints, and differentiate the resulting Lagrangian integral with respect to p at each point x. Set this derivative to zero.
Find the waveform for the average current if the voltage across a 0.06-µF capacitor is as shown in given figure.
A permanent magnet dc motor is delivering zero torque when it runs at 1800 rev/min and has 50 V dc applied to its terminals. The armature resistance is 2.0 ohm. What current will the motor need in order to deliver a torque of 2.0 Nm
Given vectors T = 2ax - 6ay + 3az and S = ax + 2ay + az, find (a) the scalar projection of T on S, (b) the vector projection of S on T, (c) the smaller angle between T and S.
Given a high or low pass RC or RL filter, indentify circuit characteristics such as AV, AVdB, AP, APdB, ZT, XT, and delete text at FC.
you have the task of ordering a replacement inductor for one that has become defective. The information on the nameplate has been painted over and cannnot be read. The machine that contains the inductor on 480V at a frequency of 60 Hz.
Find the discrete-time, pure prediction Wiener filter. - Determine and plot the PSD for the random sequence and the power transfer function.
Given one has frequency response of a system (magnitude and phase), and a sine wave of a given frequency and phase is input, explain how to find the output.
An initially uncharged 2 microfarad capacitor is connected in series with a 10 k-ohm resistor and a 12 V battery. Find the charge and voltage on the capacitor after a very long time and find the voltage and charge on the capacitor after one time co..
1A baseband signal with 4 kHz bandwidth is sampled at 1.2 times of its Nyquist sampling rate. Calculate:A. The sampling rate at which this signal is sample.B. The guard frequency band between the repeats of the spectrum.
Determine the ROM size and contents to implement a function which converts a sign and magnitude number from -5 to +6 to two's complement format.
A newly proposed thermoelectric generation material is the skutterudite family, such as FeAs3 or CoAs3. Assuming this new material has a Seebeck coefficient S = 35 V/K (microvolts per degree Kelvin), the electronic conductivity =1x104 (Ohm-cm)-1
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