EP2E04 Topic 1 Notes - DC Resistive Network Analysis

MLO 2.6 derive phasor form of voltage and current wave from/to the time-domain form

Provide 3 example calculations involving DC Circuit under transient current conditions on series R-L and series R-C circuit.

put comments to explain

for a resistance and capicitance in a series with a voltage source, show that it is possible to draw a phasor diagram for the current and all voltages from magnitude measurment of these quantities only .illustrate your answer graphically

2. What are the Advantages and Dis-advantages of using  Nodal Analysis for solving Circuit Problems? Please make an example?

For an ac circuit consisting of a load connected to a Thévenin circuit, is it possible for the load voltage to exceed the Thévenin voltage in magnitude? If not, why not? If so, under what conditions is it possible? Explain.

2. Using your values for Vps, Vind, VR, Vr, and V₁ from the Data and Calculations Tables above, construct and draw phasor diagrams on the attached graphical page below for each of the LR1, LR2, LR3, and LR4 circuits in Part 2. Be sure to appropriately label ALL the rms potentials.

A chopper circuit has an inductive load of 2ohm resistance and 10mH inductance. If the source voltage is 20 V and the frequency of the chopper is set to 100Hz and the on-time to 5 ms. Determine the average voltage and current, maximum and minimum load currents.

V, = @sin(@t) + 2@ cos(@t). For this 6. A LRC circuit below is used to modify an input voltage applicatio, = 2 ydurāifidrentidi equation gnlist be in terms of %3D charge 9 notes to generate the general solution. No other method will be accepted. Use two decimal point accuracy. You . You must use the complimentary and particular solution method as shown in your are given that -2N@² + 20N = 2@ and -2M@² +20M = 2@¸ which you must use to simplify your particular solution when you equate coefficients. L HH Va VL Vc keo = Im sin(ot) Vs

After transforming AC sources to Phasors and representing passive components in impedance, the AC circuits are equivalent to DC circuits, since the voltage (in Phasor forms, V ), the current (in Phasor forms, I), and the impedance (Z) are related by a linear equation, i.e., V=I-Z Thus, all DC circuit analysis methods are still applicable. Consider the circuit below, what is the voltage on the capacitor V¿? (Represent the result in ww the Polar form) O 10/45° O 7.07/0°V O 8.75/30° O 15.25/67.78" + V_s 10/45° R 100 Ω + V C -100jn

In the DC circuits, due to the .................... frequency, the capacitance will be ...................., while the inductor equal to ........................ circuit.

summarize about Sinusoidal Steady State Circuit Analysis!

Solve both

Needing assitance with the question in the attaced pic.

Please answer with explanation.... Constant phase shift is better than linear phase shift. Is this statement correct?

B4

a) If a DC source (frequency equal to zero) was used, what should be the ideal resistor and inductor voltages in a series RL circuit? Support your answer by providing a computation. b) If a DC source (frequency equal to zero) was used, what should be the ideal resistor and capacitor voltages in a series RC circuit? Support your answer by providing a computation.

(b) Design the circuit by finding the value for the capacitor, C and the line voltage Vpri(rms) to the circuit to produce the output as shown in Figure Q1(b).

A step-down chopper is to be used to supply power from a 600-V overhead wire to the commutator motor on a trolley bus. The motor may be mod- eled as a generated direct voltage in series with a resistance of 0.2 and an inductance of 25 mH. The frequency of the chopper is set at 500 Hz. (a) When the bus is stopped, what should be the ON time of the chopper to provide a motor current of 150 A? (b) What is the maximum possible generated voltage of the motor for which a current of 150 A can be supplied? (c) What is the average value of the supply current for the conditions of (a) and (b)? បទៅនឹងរស់របស (d) If the motor current is to be continuous, what should be its minimum. value?

8. A resistor, inductor, and capacitor are in series in a circuit where the frequency can vary from zero to a very high value that we can assume is infinity. At the frequency wo, the magnitudes of the impedances of these elements are equal. (Both = 0 and w = ∞ are considered valid frequencies.) (a) In sinusoidal steady state, can this series combination appear as a short circuit? If so, what should the frequency be? (b) In sinusoidal steady state, can this series combination appear as an open circuit? If so, what should the frequency be?

In AC power systems, a common way of thinking about reactive power among engineers is in terms of production and consumption. Inductive loads, it is said, consume reactive power. Conversely, capacitive loads produce reactive power. Explain how the models of "production" and "consumption" relate to reactive power in capacitors and inductors, respectively. Being that neither type of component actually dissipates or generates electrical energy, how can these terms be appropriate in describing their behavior?

What impedance vector - j25 represents:A. A pure resistance.            C. A pure capacitance.B. A pure inductance.           D. An inductance combined with a resistance.

B3

Please asap

What impedance vector (0- j15) Ohms represents:A. A pure resistance.         C. A pure capacitance.B. A pure inductance.       D. An inductance combined with a capacitance.

Q2: Write a lecture for teaching the complex power fed to an (R-L) load fed from an AC power source of sinusoidal voltage and current waveforms, describing its three components, their waveforms, their power triangle, and units.

Consider a circuit with a pull-down resistor in parallel to a component. Compare a resistor with higher resistance value to a resistor with lower resistance value in the parallel path. Which resistor value will pull down the potential more, relative to ground, at the high side of the component? They will pull the potential di [ Select] They will pull the potential down equally, because resistors in series have equal voltage across them, regardless of resistance value. The lower-value resistor. There is not enough information to correctly answer this question. The higher-value resistor.

In the study of MOSFET ID-VDS characteristics for different values of VGS, we came up with the following plot. Explain why the peaks of the parabolas lie on a parabola themselves. 'D,max4 'D,max3 ID,max2 VGS1-VTH...... VGS2 VTH VGS3 TH VGS1 Parabola VGS3 VGS2 Vps