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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.
Find the image produced by a local average over all neighbours - structuring element
Electrical transmission lines construction, operation and maintenance including calculations of losses for short, medium and long lines
A paddle wheel within the tank is rotated until the pressure inside rises to 20 psia. During the process 20 Btu of heat is lost to the surroundings. Determine the paddle-wheel work done. Neglect the energy stored in the paddle wheel.
It operates at a power factor of 0.85 (lagging) at its rated conditions. Calculate the per-phase current that has to be carried by the cables to the power electronics converter and the step-up transformer located at the base of the tower.
Discuss the differences between series and parallel circuits. What are some advantages and disadvantages of each type Discuss why the total power equals the sum of the individual values of power, whether a series circuit or a parallel circuit is u..
Discuss how the electricity can affect health and safety. the discusiion also must include the explanation on how to prevent the hazard of the electricity. then give three examples of the latest hazard cases that had been published since year 2000..
Find the per-unit equivalent circuit of this transformer bank. Find the voltage regulation of this transformer bank at the rated load and 0.90 PF lagging.
1. Simulate the following circuit on PSpice showing the capacitor current and capacitor voltage during the transient phase. Use the following component values in the circuit: L = 1 mH, C = 1.57 µF. In your simulation calculate the resistor values ..
A silicon p-n-p transistor has impurity concentrations of 5*10^18, 2*10^17, and 10^16 cm^-3 in the emitter, base, and collector, respectively. The base width is 1.0 um and the device cross-section area is 0.2 mm^2.
Identify the beginning point by an X and (q=0) label,and the ending point by an x with a (q= ∞) label. showthe q locus as a solid line, with arrow heads on it which indicatethe direction for the increasing values of positive q.
the donor energy level is approximately 0.1 ev below the conduction band. the approximate value is calculated from the binding energy equation from hydrogen. derive the binding or ionization energy which is equal to the total energy.
To play music, these types of players have a decoder circuit that can decode the binary representation of the piece of music to be played. The electronic signals corresponding to the notes that are to be 'played' can then be transmitted to a speak..
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