Motion: Phasor Notation Of A Sinusoid.

S contains mn, n = 1, 2, 3
S = Earth; m1 = voltage source, V1(t); m2 = voltage source, V2(t); m3 = voltage source, Vs(t);

Phasor Sum of Voltage Signals

Figure 8.25 shows the sum Vs(t) of the sinusoidal voltage signals V1(t) and V2(t).

Determine Vs in its phasor and time-domain form. Given the following information:
V1(t): amplitude = 15; frequency = 377; phase angle = 45o.
V1(t): amplitude = 15; frequency = 377; phase angle = 30o.

Change: What Is Time? - Peter O. Sagay.

Language is one of humanity's greatest inventions. It allows us to formulate refined and communicable thoughts. However, sometimes language is problematic. There are instances when precise definitions of certain concepts are difficult to realize. So we try and try, and we come up with various definitions, from simple to complex, and still fall short of the desired goal. I believe that Time belongs to this group. It is perhaps the most defined concept. It has preoccupied humans since the dawn of their existence.

Containership: God Is Not Pre-Occupied With Sins.

God Is not pre-occupied with sins. He is more interested in...

Change: Second Order Circuits (RLC) Contd.

S contains mn, n = 1, 2, 3, 4
S = Earth; m1 = voltage source (Vs), 200 V; m2 = inductor, 0.1 H; m3 = R, 200 Ω m4 = Capacitor, 100 μF; m5 = R2, 22 kΩ

RLC circuit Problem 8.23

Figure 8.23 is the RLC circuit for the given circuit elements. The switch is closed at t = 0 after having been open for an extended period of time.

Determine the current transient, assuming zero initial charge on the capacitor.

Change: Second Order Circuits (RLC) Contd.

S contains mn, n = 1, 2, 3, 4, 5, 6, 7, 8
S = Earth; m1 = voltage source (Vs1), 15 V; m2 = Rs1, 130 kΩ; m3 = inductor, 17 mH; m4 = Rs1, 1.1 kΩ m5 = Capacitor, 0.35 μF; m6 = R2, 700 Ω m7 = Rs2, 290 kΩ; m8 = voltage source (Vs2), 9 V;

RLC circuit Problem 5.58

Figure 5.58 is the RLC circuit for the given circuit elements. The switch is closed at t = 0 after having been open for an extended period of time.

Determine the voltage across the capacitor and the current through the inductor and Rs2, as t approaches infinity.

Change: Second Order Circuits (RLC) Contd.

S contains mn, n = 1, 2, 3, 4, 5
S = Earth; m1 = voltage source, 12 V; m2 = inductor, 0.9 mH;
m3 = R1, 31 kΩ; m4 = Capacitor, 0.5 &muF;; m5 = R2, 22 kΩ

RLC circuit Problem 5.58

Figure 5.57 is the RLC circuit for the given circuit elements. The switch is closed at t = 0 after having been open for an extended period of time.

Determine the current through the inductor and the voltage across the capacitor after the circuit has returned to steady state.

Change: Second Order Circuits (RLC).

S contains mn, n = 1, 2, 3, 4
S = Earth; m1 = voltage source, v(t); m2 = inductor; m3 = Capacitor; m4 = Resistor;

Second order Circuits

Figure 8.1(a) and 8.1(b) are second order circuits. In figure 8.1(a), the capacitor and inductor are in parallel. In figure 8.1(b), the capacitor and inductor are in series.

Determine the differential equations for the circuit in terms of the inductor current iL(t).

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