The energy stored in the 5 µF capacitor is 1.215 mJ. The potential difference between its plates A11 is The total capacitance of three identical capacitors connected in parallel is 15 pF. The A12 capacitance value of each capacitor is
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- The circuit is operating inthe sinusoidal steady state. The capacitor is adjusted until the current igis in phase with the sinusoidal voltage vg.1. Specify the capacitance in microfarads if vg=80 cos5000t V.2. Give the steady-state expression for ig when C has the value foundin (a).Why is the following situation impossible? The LC circuit as shown has L = 30.0 μH and C = 50.0 μF. The capacitor has an initial charge of 200 μC. The switch is closed, and the circuit undergoes undamped LC oscillations. At periodic instants, the energies stored by the capacitor and the inductor are equal, with each of the two components storing 250 μJ.The capacitor of external defibrillator must be loaded at 1500V, in order to generate a two-phase wave of 150 J.Considering a transthoracic impedance is 80ohms and a capacitance of 30 000 uF. 3- What is the energy of the capacitor?4- What is the internal impedance of the defibrillator in the previous cases?
- An electrical circuit has a very small resistance so it can be despised. The capacitor on the left was charged up to the voltage of Vo=10 volts and then, at time t=0, the switch S was closed. The capacity of the capacitors are C=60 µF, and the coil inductance is L=0.04 HI) Find the voltage on the left capacitor, at the instant V1=0.001 s.II) Find the voltage in the right capacitor, at the instant t=002 s.3. Write the equation for capacitor voltage, v(t)=V0e−t/τ, for t≥0Let Vs=530tᶾ v, leg t >0 and iL (0) = 1 A, in the circuit shown, at t=0.2s, determine the values of the energy stored in the capacitor and the coil. The circuit is in the attached image.
- A 20µF capacitor has a sinusoidal voltage across it given by?(?) = 5 sin(500? + 45°) V.(a) Find the phasor representation of the voltage in polar (magnitude and phase) form.(b) Find the phasor representation of the voltage in Cartesian (real and imaginary part) form.(c) Find the phasor representation of the current through the capacitor. (d) If this same voltage appeared across the terminals of a 100mH inductor, what would be thephasor representation of the inductor current?Given the capacitance of four capacitors Ca= 30 µF, Cb = 20 µF, Cc = 40 µF and Cd = 10 µF. If Cb and Cc are connected in parallel and the parallel combination is connected in series with Ca and the combination is further connected in parallel with Cd, calculate (a) the equivalent capacitance (b) the voltage across each capacitor if the circuit is supplied by 240 volts DC source (c) the charge on each capacitor.The current in the 20 mH inductor is 10 cos(10,000t + 30°)mA.Calculate (a) the inductive reactance; (b) the impedance of the inductor;(c) the phasor voltage V; and (d) the steady-state expression for v(t)
- The voltage applied to the circuit shown at t=0 is20 cos(800t+25∘) V. The circuit resistance is 80 Ω and the initialcurrent in the 75 mH inductor is zero.1. Find i(t) for t≥0.2. Write the expressions for the transient and steady-state componentsof i(t).3. Find the numerical value of i after the switch has been closed for1.875 ms.4. What are the maximum amplitude, frequency (in radians persecond), and phase angle of the steady-state current?5. By how many degrees are the voltage and the steady-state currentout of phase?Homework: For the circuit shown Find the mathematical expression for the transient behaviour of the V C and ic if the capacitor was initially uncharged and the switch is closed at position 1 when 1. 2. 3. t = 0 sec. Find the mathematical expression for V C and ic if the switch is moved to position . 2att - 1 Plot the waveforms of the V C and i C obtained from the parts 1 to 3. i C; 10mu 4 mA R 1 * 5k * Omega C R 2; 1k * Omega; R 3 3 kΩ in the figure below:A series L–R–C circuit has a supply input of 5 volts. Given that inductance, L = 5 mH, resistance, R = 75ohm and capacitance, C = 0.2µF, determine (c) the frequency at which the p.d. across the capacitance is a maximum and (d) the value of the maximum voltage across the capacitor. answer: c) 4741 hz, d)10.85volts