JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech I Year ELECTRICAL CIRCUIT ANALYSIS II Previous Question Paper (January/February - 2024 - R22)
Note: This question paper contains two parts A and B. Part-A for 10 marks, Part-B for 50 marks. Part-A is a compulsory question. Part-B consists of ten questions (numbered from 2 to 11) carrying 10 marks each. From each unit, there are two questions and the student should answer one of them.
Part A
Part-A consists of ten sub-questions.
A circuit having a resistance of 5 ohms, and a variable capacitance of 50 μF in series, is connected across a 230 V, d.c supply. Calculate the current flowing through the circuit.
Answer
In a d.c. circuit, a capacitor acts as an open circuit once it is fully charged. Therefore, the steady-state current flowing through the circuit is 0 A.
Define time constant of R-C series circuit under transient conditions.
Answer
The time constant of an R-C series circuit is defined as the time taken by the capacitor to charge to approximately 63.2% of its final steady-state voltage, or to discharge to approximately 36.8% of its initial voltage. It is given by the product of resistance and capacitance:
Find the inverse Laplace transform of the function
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Find the current in the network after the switch closes at t=0. Assume initial current to be i0.
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Calculate the open circuit impedance parameters for the resistive T network.
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Derive the condition of reciprocity for the symmetrical П network.
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State the differentiation rule for Fourier transform.
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What is discrete spectrum?
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What is band pass filters?
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What is low pass filter?
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Part B
Obtain the expressions for the initial value and slope of vc, ic, ir and iL in the circuit when is= I1 for t<0.
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An electronic switching circuit has a switch that has been in the upper position for a long time before t = 0. Find v(t) and i(t) for t>0, taking the element X to be a 5 microfarad capacitor.
Answer
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For the given circuit, find V0(t) for t > 0, when the switch (s) is opened at t = 0.
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Find the transient current flowing through series R-L-C circuit suddenly excited by d.c source of ‘V’ volts at t=0.
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For the given two port network, calculate the Y parameters, ABCD parameters.
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For the following circuit, calculate Z parameters and hybrid parameters.
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What is fourier integral? Explain its properties.
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Determine the constant coefficients, and fundamental and third harmonic coefficients of the Fourier series for the periodic waveform shown.
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Describe the design procedure of the constant K high pass filter.
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Describe the design procedure of the m-Derived filters.
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