Electronics Engineering

Solution Library


Calculate Resistance And Reactance In Secondary Winding

Question A 10Kva, 2000/400 volts,50Hz,single-phase transformer supplies full load at a power factor of 0.8 lagging. The resistance of the primary winding are 5.5Ω and 12Ω respectively. The resistance and reactance of the secondary winding are 0.2Ω and 0.5Ω respectively. The ... Read More

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Calculate Flow Rate And Power Required By A Pump

Question A centrifugal pump running at 1400 rpm has the characteristic curve shown below. The pump will be installed in an existing line with known head requirements given by the formula H = 30 + 2Q2, where H is the system head in ft and Q is the flow rate in cfs. The pump efficiency is 86%. Wha ... Read More

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Find V2 Current And KVA Ratings For Autotransformer

Question A 90 MVA single phase transformer rated 80/120kV is connected as an autotransformer. Rated voltage |V1| = 80 kV is applied to the low-voltage winding of the transformer. Consider the transformer to be ideal and the load to be such that currents of rated magnitudes |I1| and |I2| flow in the ... Read More

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Calculate RMS Value, Power Dissipation and Expression Representing Current Flowing In A Circuit

Question A supply voltage is given by v = 240 sin 314t + 40 sin 942 t + 30 sin 1570t is applied to a circuit comprising a resistance of 12 Ω connected in series with a coil of inductance 9.55 mH. (i) Derive an expression to represent the current flowing in the circuit. (ii) Determine the rm ... Read More

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Calculate RMS Of Voltage And Current And Calculate Total Power Supplied And Power Factor In Circuit

Question The voltage applied to a circuit and the resulting current flowing in the circuit are given by the following equations: v = 100 sin wt + 22sin[3wt -∏/6] + 8 sin [5wt - ∏/4] volts i = 5 sin[wt + ∏/3] + 19.1 sin 3 wt + 0.76 sin (5wt – 0.452) amperes Determine: (i) th ... Read More

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Determine Fourier Series In Waveforms

Question Determine the Fourier series for the waveforms shown in Figure 3a and Figure 3b. All the relevant formulae and equations used in the solutions should be clearly stated. Use the most appropriate theories and equations used in the solutions should be clearly stated.     Summary ... Read More

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Use Laplace Transform To Derive Expression For Flow Of Current In Circuit

Question The capacitor C shown in figure 4 is initially uncharged and the switch S is opened. (i) Use Laplace transform to derive an expression for the current i (t) that flows in the circuit immediately after closing the switch S. (ii) Determine whether the circuit is critically damped, under-da ... Read More

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Use Laplace Transform To Derive Expression For Loop Currents In Circuit

Question For the network shown in Figure 5, using Laplace transforms and inverse Laplace transforms, derive expressions for the loop currents i1(t)and I 2(t) that would flow when the switch S is closed. Assume that the capacitor is initially uncharged. All the relevant formulae and equations used i ... Read More

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Find Current Through Resistor Superposition

Question Find the current through R1 using superposition Summary The question belongs to Electrical Engineering and it discusses about finding current through superposition of a resistor. Total Word Count NA ... Read More

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Find Current Through Resistor Using Cramer’s Rule And Mesh Analysis

Question Find the current through using mesh analysis. Use Cramer’s Rule to solve the equations.   Summary The question belongs to Electrical Engineering and it discusses about using mesh analysis and Cramer’s rule to find current through a resistor in a circuit. Total Word Cou ... Read More

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Find All Node Voltages Using Inverse Matrix Techniques

Question Find all node voltages. Use the inverse matrix technique to solve the equations. For the inverse of a 3x3 matrix, you can use the online calculator at http://www.bluebit.gr/matrix-calculator/default.aspx Summary The question belongs to Electrical Engineering and it discusses about find ... Read More

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Find Thevenin Equivalent Circuit Values In A Circuit

Question Find the Thevenin Equivalent circuit values for the circuit below at terminals ab. Summary The question belongs to Electrical Engineering and it discusses about finding Thevenin Equivalent circuit values for the circuit given in the question. Total Word Count NA ... Read More

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