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electrical engineering

Questions and Answers of Electrical Engineering

Design a band-pass filter with a low cutoff frequency of approximately 4535Hz and a high cutoff frequency of approximately 5535 Hz.
Design a first-order low-pass active filter of the form shown in figure that has a dc gain of – 20 and a cutoff frequency of 50 kHz. Assume that R1 = 1kΩ
Given the circuit in figure, design a second-order band-pass filter with a center frequency gain of ? 5, w0 = 50krad/s, and a BW = 10krad/s. Let C1 = C2 = C and R1 = 1k?. What is the Q of this
Referring to Example, design a notch filter for the tape deck for use in Europe, where power utilities generate at 50Hz.
An engineer has proposed the circuit shown in figure to filter out high-frequency noise. Determine the values of the capacitor and resistor to achieve a 3-dB voltage drop at 23.16kHz.
For the high-pass active filter in figure, choose C, R1, and R2 such that Ho = 5 and fc = 3kHz.
For the low-pass active filter in figure, choose R2 and C such that Ho =? 7 and fc = 10 kHz.
The second-order low-pass filter shown in figure has the transfer function. Design a filter with Ho = ? 10 and fc = 500 Hz, assuming that C1 = C2 = 10nF and R1 = 1k?.
Given the second-order low-pass filter in figure, design a filter that has Ho = 100 and fc = 5 kHz. Set R1 = R3 = 1k?, and let R2 = R4 and C1 = C2. Use an op-amp model with Ri = ?, R0 = 0, and A =
Determine the voltage V0 at resonance in the circuit in figure. a. 60? b. 35? c. 40? d. 30
Given the series circuit in figure, find the value of R so that the BW of the network about the resonant frequency is 200 rad/s. a. 8 ? b. 2 ? c. 4 ? d. 6 ?
Given the low-pass filter circuit shown in figure, find the frequency in Hz at which the output is down 3dB form the dc, or very low frequency, output. a. 26 Hz b. 60 Hz c. 47 Hz d. 32Hz
Given the band-pass filter shown in figure, find the value of R necessary to provide a resonant frequency of 1000 rad/s and a BW of 100 rad/s. a. 2 ? b. 10 ? c. 6 ? d. 5 ?
Given the low-pass filter shown in figure, find the half-power frequency of this circuit, if the source frequency is ? Hz. a. 8 Hz b. 2 Hz c. 12 Hz d. 4 Hz
If f(t) = e-at sin bt, find F(s) using(a) The definition of the Laplace Transform and(b) The fact that L[e-at f(t)] = F(s + a).
Find f(t) if F(s) is given by theexpression
Find f(t) if F(s) is given by theexpression
Find f(t) if F(s) is given by theexpression
Given the function find the initial and final values of the function by evaluating it in both the s-domain and timedomain.
If f(t) = e–at sin wt, show that F(s) = w / (s + a)2 + w2.
If f(t) = e – at, show that F(s) = 1 / (s + a).
Find the Laplace transform of the function f(t) = te – at sin (wt) δ (t – 4).
Find the Laplace transform of the function f(t) = te –at δ(t – 1).
Use the time-shifting theorem to determine L[f (t)], where f(t) = [t – 1 + e – (t – 1)] u (t – 1).
If f(t) = te – (t – a) u (t – a) – e –t u (t – a), find F(s).
If f(t) = t cos (wt) u (t – 1), find F(s).
If f(t) = t sin (wt)u (t – 1), find F(s).
If f(t) = e – at cos wtu (t – 1), find F(s).
If f(t) = e – at cos wtu (t – 1), find F(s). Discuss.
If F(s) = (s + 1)2 (s + 3)2 / (s + 2) (s + 4), find f(t).
If F(s) = (s + 2)2 / (s + 1) (s + 3), find f(t).
Given the following functions F(s), findf(t).,
Use MATLAB to findf(t).
Given the following functions F(s), findf(t).
Given the following functions F(s), findf(t).
Given the following functions F(s), findf(t).
Given the following functions F(s), find the inverse Laplace transform of eachfunctions.
Given the following functions F(s), find f(t).
Find f(t) if F(s) is given by theexpression
Use MATLAB to findf(t).
Solve the following differential equations using Laplacetransforms.
Solve the following integro differential equation using Laplace transforms.
Use Laplace transforms to find y(t) if
Find f(t) using convolution if F(s)is
Find the final values of the time function f(t) given that
Find the initial and final values of the time function f(t) if F(s) is givenas
Determine the initial and final values of f(t) if F(s) is given by theexpressions
In the network in figure, the switch opens at t = 0. Use Laplace transforms to find i(t) for t >0.
In the circuit in figure, the switch moves from position 1 to position 2 at t = 0. Use Laplace transforms to find v(t) for t >0.
The switch in the circuit in figure, opens at t = 0, Find i(t) for t > 0 using Laplacetransforms.
In the network in figure, the switch opens at t = 0. Use Laplace transforms to find v0(t) for t >0.
In the network in figure, the switch opens at t = 0. Use Laplace transform to find iL(t) for t >0.
The switch in the circuit in figure has been closed for a long time and is opened at t = 0. Find i(t) for t > 0, using Laplacetransforms.
The switch in the circuit in figure has been closed for a long time and is opened at t = 0. Find i(t) for t > 0, using Laplacetransforms.
In the circuit shown in figure, switch action occurs at t = 0. Determine the voltage vo(t), t > 0 using Laplacetransforms.
The switch in the circuit in figure has been closed for a long time and is opened at t = 0. Find i(t) for t > 0, using Laplacetransform.
The switch in the circuit in figure has been closed for a long time and is opened at t = 0. Find i(t) for t > 0 using Laplacetransforms.
The output function of a network in expressed using Laplace transform in the following form. Find the output vo(t) as a function oftime.
The Laplace transform function representing the output voltage of a network is expressed as, determine the value of vo(t) at t = 100ms. a. 0.64V b. 0.45V c. 0.33V d.0.24V
The Laplace transform function for the output voltage of a network is expressed in the following form. Determine the final value of this voltage, that is, vo(t) t ? ? a. 6 V b. 2 V c. 12 V d. 4 V
The output of a network is expressed as determine the output as a function oftime.
Solve the following differential equation using Laplacetransforms.
Find the exponential Fourier series for the waveform infigure.
Determine the trigonometric Fourier series for the function shown infigure.
Find the trigonometric Fourier series for the waveform shown infigure.
Find the steady-state voltage v0 (t) in the circuit in figure if the input voltage is the waveform shown in figure with A =1V.
Given the network in figure with the input source v, (t) = 10e?2t u(t) V, use the transform technique to find v0 (t).
Find the exponential Fourier series for the periodic signal shown infigure.
Find the exponential Fourier series for the periodic pulse train shown infigure.
Find the exponential Fourier series for the signal shown infigure.
Find the exponential Fourier series for the signal shown infigure.
Compute the exponential Fourier series for the waveform that is the sum of the two waveform in figure by computing the exponential Fourier series of the two waveforms and addingthem.
Given the waveform in figure, determine the type of symmetry that exists if the origin is selected at (a) l2 and (b) l2.
What type of symmetry is exhibited by the two wave-forms isfigure.
Find the trigonometric Fourier series for the waveform shown infigure.
Find the trigonometric Fourier series for the periodic waveform shown infigure.
Given the waveform in figure, showthat
Find the trigonometric Fourier series coefficients for the waveform in figure.
Find the trigonometric Fourier series coefficients for the waveform infigure.
Find the trigonometric Fourier series coefficients for the waveform infigure.
Find the trigonometric Fourier series coefficients for the waveform infigure.
Find the trigonometric Fourier series coefficients for the waveform infigure.
Derive the trigonometric Fourier series for the waveform shown infigure.
Find the trigonometric Fourier series coefficients for the waveform infigure.
Find the trigonometric Fourier series for the waveform shown infigure.
Derive the trigonometric Fourier series for the function shown infigure.
Derive the trigonometric Fourier series for the function v(t) = A | sin t | as shown infigure.
Derive the trigonometric Fourier series of the waveform shown infigure.
Use PSPICE to determine the Fourier series of the waveform in figure in theform.
Use PSPICE to determine the Fourier series of the waveform in figure in theform.
Use PSPICE to find the Fourier coefficients for the waveform infigure.
Use PSPICE to find the Fourier coefficients for the waveform infigure.
Use PSPICE to find the Fourier coefficients for the waveform infigure.
The discrete line spectrum for a periodic function f(t) is shown in figure. Determine the expression forf(t).
The amplitude and phase spectra for a periodic function v(t) that has only a small number of terms is shown in figure. Determine the expression for v(t) if To = 0.1s.
Plot the first four terms of the amplitude and phase spectra for thesignal.
Determine the steady-state response of the current io(t) in the circuit shown in figure if the input voltage is described by the waveform shown inproblem.
If the input voltage in problem is find the expression for the steady-state currentio(t).
Determine the first three terms of the steady-state voltage vo(t) in figure if the input voltage is a periodic signal of theform
Determine the steady-state voltage vo(t) in the network in figure if the input current is given infigure.

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