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Determine i, io, and vo for all t in the circuit shown in Fig. 7.22. Assume that the switch was closed for a long time. It should be noted that opening a switch in series with an ideal current source creates an infinite voltage at the current source terminals. Clearly this is impossible. For the purposes of problem solving, we can place a shunt resistor in parallel with the source (which now makes it a voltage source in series with a resistor). In more practical circuits, devices that act likecurrent sources are, for the most part, electronic circuits. These circuits will allow the source to act like an ideal current source over its operating range but voltage-limit it when the load resistor becomes too large (as in an open circuit).
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FUND.OF ELECTRIC CIRCUITS (LL)-W/ACCESS
- Compare the performances of the first order system, the overdamped, underdamped and critically damped second order system.arrow_forwardNo energy is stored in the circuit shown when the input voltagevg jumps instantaneously from 0 to 25 mV 1. Derive the expression for vo(t) for 0≤t≤tsat.2. Find the time tsat when the circuit saturates.arrow_forwardFind all the possible condition for the overdamper, underdamped and critically damped system.arrow_forward
- Given the circuit below with the switch closed for a long time, then opening at t=0, and with the values R1=129KΩ, R2=128KΩ, R3=103KΩ, calculate the time constant, τ, for the capacitor voltage solution for at t >0.arrow_forwardThe switch in Fig. is moved from A to B at t -0 after being at A for a long time. This places the two capacitors in series, thus i0 allowing equal and opposite de voltages to be trapped on the capacitors. (a) Determine v1(0-), v2(0-), and vR(0-). (b) Find v1(0+), v2(0+), and vR(0+). (c) Determine the time constant of vR(t). (d) Find vR(t), t> 0. (e) Find t). (1) Find v1(t) and v2(t) from i(t) and the initial values (g) Show that the stored energy at twe plus the total energy dissipated in the 20k resistor is equal to the energy stored in the capacitors at t-0. 5 kn B 20 kf 100 V S uF 20 aFarrow_forwarda) What should be the K value for the closed system to be critically damped? b) In what range should the K value be in order for the given system to be underdamped and overdamped.arrow_forward
- The switch in Figure 7 has been at position a for a long At t = 0, the switch moves to position b. For t > 0, with the aid of appropriate circuit diagram, determine the expression for voltage of capacitor, vC(t) current flows through the capacitor, iC(t).arrow_forwardGiven fig. 7. Find vc(0) 8. Find vc(t) 9. Find vc(∞)arrow_forward7.4 The switch in the circuit shown has been closed for a long timebefore being opened at t=0.2. b) What percentage of the initial energy stored in the circuit hasbeen dissipated after the switch has been open for 60 ms?arrow_forward
- 7. 7.7 PSPICEMULTISIM The switch in the circuit has beenclosed for a long time. At t=0 it is opened.2. b) Write the expression for vo(t) for t≥0+.arrow_forwardWhat is the time constant (tau) of the circuit? and Find Vc at t=0.05 sec after the circuit is connected to the source.arrow_forwardConsider the circuit in Exercise 30.21. (a) Just after the circuit is completed, at what rate is the battery supplying electrical energy to the circuit? (b) When the current has reached its final steady-state value, how much energy is stored in the inductor? What is the rate at which electrical energy is being dissipated in the resistance of the inductor? What is the rate at which the battery is supplying electrical energy to the circuit? Exercise 30.21 circuit: An inductor with an inductance of 2.50 H and a resistance of 8.00 Ω is connected to the terminals of a battery with an emf of 6.00 V and negligible internal resistance.arrow_forward
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