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engineering
electrical engineering
Questions and Answers of
Electrical Engineering
The voltage v1 (t) in a network is defined by the equation
The output voltage of a circuit is described by the differential equation
The parameters for a parallel RLC circuit are R = 1 ohms, L = 1/5 H, and C = 1/4F. Determine the type of damping exhibited by the circuit.
A series RLC circuit contains a resistor R = 2 ohms and a capacitor C = 1/x F. Select the value of the inductor so that the circuit is critically damped.
For the under damped circuit shown in Fig. 6.61 determine the voltage v(t) if the initial conditions on the storage elements are iL (0)=1 A and v(0) = 10 V.
Given the circuit and the initial conditions of Problem 6.61, determine the current through the inductor.
Find vC(t) for t > 0 in the circuit in Fig. P6.63 if vC(0) = 0.
Find v0(t) for t > 0 in the circuit in Fig. P6.64 and plot the response including the time interval just prior to moving the switch.
Find vC(t) for t > 0 in the circuit in Fig. P6.65.
Find iL(t) for t > o in the circuit in Fig. 6.65.
Given the circuit in Fig. 6.67, find the equation for i(t), t > 0.
In the circuit shown in Fig. P6.68, find v(t), t > 0.
Find i0(t) for > 0 in the circuit in Fig. P6.69 and plot the response including the time interval just prior to opening the switch.
Find v0(t) for t > 0 in the circuit in Fig. P6.70 and plot the response including the time interval just prior to closing the switch.
Find v0(t) for t > 0 in the circuit in Fig. P6.71 and plot the response including the time interval just prior to moving the switch.
Using the PSPICE Schematics editor, draw the circuit in Figure P6.72, and use the PROBE utility to plot vC(t) and determine the time constants for 0
Using the PSPICE Schematics editor, draw the circuit in Figure P6.73, and use the PROBE utility to find the maximum values of vL(t), iC(t), and i(t).
Design a series RCL circuit with R>= 1Kohm that has characteristic equation. S^2 + 4*10^6S +4*10^14 = 0
Design a parallel RLC circuit with R>=1kohm that has the characteristic equation S^2 + 4*10^7S +3*10^14 = 0
In the circuit in Fig the switch, which has been closed for a long time, opens at t=0. Find the value of the capacitor voltage Vc(t) at t=2s.
In the network in fig, the switch closes at t=0. Find Vo(t) at t=1s.
Assume the switch, in the network in fig, has been closed for sometime. At t=0 the switch opens. Determine the time required for the capacitor voltage to decay to ½ of its initially charged
Given i(t)=5 cos(400t –120°) A, determine the period of the current and the frequency in hertz.
Determine the relative position of the two sine waves V1(t)=12 sin(377t-45°) V2(t)=6 sin(377t+675°)
Given the following currents:
Determine the phase angles by which leads and leads , where
Calculate the current in the resistor if the voltage input is:(a) v1(t)=10 cos(377t+180°)(b) v2(t)=12 sin(377t+45°)
Calculate the current in the capacitor if the voltage input is:(a) v1(t)=16 cos(377t 22°)(b) v2(t)=8 sin(377t + 64°)
Calculate the current in the inductor if the voltage input is:(a) v1(t)=24 cos(377t + 12°)(b) v2(t)=18 sin(377t 48°)
Find the frequency domain impedance, Z, for the network shown.
Find the frequency domain impedance, Z, for the network shown.
Find the frequency domain impedance, Z, for the network shown.
Find the frequency domain impedance, Z, for the network shown.
Find the frequency domain impedance, Z, for the network shown.
Find Z(j) at a frequency of 60 Hz for the network shown
Calculate the equivalent impedance Z at the terminals A-B for the network shown
Find Z for the network shown.
Find Z for the network shown.
Find Z for the network shown
The impedance of the network shown is found to be purely real at f=60 Hz. What is the value of C?
In the circuit shown determine the value of the inductance such that the current is in phase with the source voltage.
Draw the frequency domain circuit and calculate I(t) for the circuit shown if vs(t)=10 cos(377t+30°) V.
Draw the frequency domain circuit and calculate v(t) for the circuit shown if Is(t)=20 cos(377t+120°) A.
The voltages vR(t), vL(t), and vC(t) in the circuit shown can be drawn as phasors in a phasor diagram. Show that vR(t) + vL(t) + vC(t) = vS(t).
The currents iR(t), iL(t), and iC(t) in the circuit shown can be drawn as phasors in a phasor diagram. Show that iR(t) + iL(t) + iC(t) = iS(t).
The voltages vR(t) and vL(t) in the circuit shown can be drawn as phasors in a phasor diagram. Use a phasor diagram to show that vR(t) + vL(t) = vS(t).
The currents iR(t) and iC(t) in the circuit shown can be drawn as phasors in a phasor diagram. Use a phasor diagram to show that iR(t) + iC(t) = iS(t).
The currents iLa (t) and iC (t) of the inductor and capacitor in the circuit shown can be drawn as phasors in a phasor diagram. Use a phasor diagram to show that iL(t) + iC (t) = iS(t). i
In the currents shown determine the frequency at which i(t) is in phase with vs(t).
Find the frequency domain voltage V0 as shown.
Find the frequency domain voltage V0 as shown
Find the frequency domain current I0 as shown.
Find the frequency domain voltage V0 as shown.
Draw the frequency domain network and calculate v0(t) in the circuit shown if iS(t)=100cos(5000t+8.13°)mA. Also, using a phasor diagram, show that iL(t)+ iR(t)= iS(t).
Draw the frequency domain network and calculate v0(t) in the circuit shown if iS(t)=100cos(5000t+8.13°)mA. Also, using a phasor diagram, show that i1(t)+ i2(t)= iS(t).
Find I0 in the network shown.
Find I0 in the network shown.
In the circuit shown, if V0=445° V, find I1
Find VS in the network shown if V0=4
Find VS in the network shown if Io=2
Find VS in the network shown if Io=2
Find IS in the network shown if Vo=2
Find IS in the network shown if V0=2
In the network shown Vo=4
In the network shown Vo=2
Find I0 in the network shown if IS=12
Use nodal analysis to find I0 in the circuit shown.
Use nodal analysis to find V0 in the circuit shown.
Find V0 in the network shown using nodal analysis.
Use nodal analysis to determine I0 in the network shown.In addition, solve the problem using MATLAB.
Find V0 in the network shown.
Find the voltage across the indicator in the circuit shown using nodal analysis.
Use mesh analysis to find V0 in the circuit shown.
Use mesh analysis to find V0 in the circuit shown.
Using loop analysis, find I0 in the network shown.
Find V0 in the network shown.
Find V0 in the network shown.
Use superposition to find V0 in the network shown.
Find V0 in the network shown using superposition.
Using superposition, find V0 in the circuit shown.
Use both superposition and MATLAB to determine V0 in the circuit shown.
Use source exchange to determine V0 in the network shown.
Use source exchange to find the current I0 in the network shown.
Use source transformation to determine I0 in the circuit shown.
Use Thevenins theorem to find V0 in the circuit shown.
Using Thevenins theorem, find V0 in the network shown.
Use Thevenins theorem to find V0 in the circuit shown.
Solve Problem 7.49 using Thevenins theorem.
Apply Thevenins theorem twice to find V0 in the circuit shown.
Find V0 in the network shown using Thevenins theorem.
Find the Thevenin equivalent for the network shown at the terminals A-B.
Find Vx in the circuit shown using Nortons theorem.
Find I0 in the network shown using Nortons theorem.
Apply both Norton’s theorem and MATLAB to find V0 in the network shown.
Find V0 using Nortons theorem for the circuit shown.
Use Nortons theorem to find V0 in the network shown.
Use MATLAB to find the node voltages in the network shown.
Using the PSPICE Schematics editor, draw the circuit shown. At what frequency are the magnitudes of iC(t) and iL(t) equal?
Using the PSPICE Schematics editor, draw the circuit shown. At what frequency are the phases of il(t) and vx(t) equal?
Find V0 in the network shown.
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