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Electronic Engineering

Circuit Analysis

Consider the given circuit; the voltage step is an "ideal" pulse going from 0V to 4V and then back to 0V; the pulse width is 5 microseconds wide. How do I find the voltage across the resistor, Vr(t) 7 microseconds after the rising edge of the input impulse?

Phase angle and margin

I'm trying to find the angles of departure and angles of arrival for an equation. In my current problem, I am looking for the angle of departure for GH=10(s+z)/s^2 (also GH(jw)=10(jw+z)/(jw^2) The angle of departure is defined as 180 degrees plus the phase angle of GH computed at the complex pole, but ignoring the contrib


A capacitor is used in the electronic flash unit of a camera. A small battery with a constant voltage of 6 V is used to charge the capacitor with a constant current of 10 microamperes. How long does it take to charge the capacitor when C = 10 microfarads? My Answer: V=6V i=10mA C=10microF Wc=1/2CV^2*(t) Wc=1/2(10^-5)6^2*(t

Electric Heater

The Problem: An Electric Heater is connected to a constant 250-V source and absorbs 1000 W. Subsequently, this heater is connected to a constant 210 V source. What power does it absorb from the 210-V source? What is the resistance of the heater?

Closed Loop Control Systems

2. a) In this question you have to determine the closed loop transfer function and then use the characteristic equation to determine the closed loop poles (roots) of the system. Prove that the closed loop transfer function is given by: C(s)/R(s) = G(s)/(I + G(s)H(s)) b) What is the significance of the characteristic equati

Logic Circuit Question

Question: The outputs of two "NAND" gates are connected to the inputs of an "Exclusive Or" gate. Each of the "NAND" gates has one input at a logic high level, and the other input at a logic low level. What is the output of the "Exclusive Or" gate? a) Logic high b) Logic low c) Logic low, unless the output is "open collecto

RC Series Circuit

I am attaching a scanned image of a question, please answer and include the method used for solving. See attached file for full problem description.

Transient response of second order circuit

Assume DC steady-state conditions exist for t>0. Determine the voltage across the capacitor and the current through the inductor and Rs2 as t approaches infinity. See attachment for diagram.

Current Through a Capacitor in Steady State Conditions

Determine the current through the capacitor just before and just after the switch is closed in the figure. Assume steady-state conditions for t<0. V1 = 12 V C= 0.5uF R1 = 0.68K Ohms R2 = 1.8K Ohms Please see attachment for diagram.

Electrical Grounding and polarity

To whom it may concern, From chemistry I understand that electron flow is from negative to positive, in the external circuit. I also understand that "conventional current" flows positive to negative, and is used to solve mathamatical electricity problems and it was determined back in the day as current direction. But, if t

Symmetrical Components of Line Circuits

Determine the symmetrical components of the following line circuits: Ia = 100A, Ib = j100A, and Ic = 0A. There are four possible options in the attached file.

Control Systems - Root Locus

Draw the positive and negative gain root locus for the closed loop system with the open loop transfer function L(s)=... The following information may be used: Angles of departure... Break away points... (See attachment for all details).

Nyquist, Bode Plot and Root Locus

A) Analyse the closed loop stability of the system with open loop transfer function {see attachment} i)Make a sketch of the Bode diagram and hence the full Nyquist diagram, showing all relavent details ii) If the system is unstable, state the number of closed loop right hand plane poles and comment on how you might stabili

Root Locus of a System

Draw the root locus for the system with the open loop transfer function given in the attachment that is connected to a negative feedback loop and confirm the relevant break-away points are at s = 0 and s = -1.

Circuit problem

Find I and Vs in the circuit (shown in the attachment) if the current through the 3 ohm resistor is 2A. See attached file for full problem description.

FINFET---a type of MOSFET

The question is below. Please include where you find the resource to answer this question. Thanks. As the gate length of MOSFET transistor shrinks to nanometer scale, the operation of MOSFET is limited by fundamental physical process. One of the most severe limitation is the inability to reach complete cut-off mode for nano

Numerical Integration and Euler's Formula

For this question, please leave out the proof. Assume the formula is already known. Also, instead of assuming a unit step of U(t) = 1(t), change the question to a sinusoidal input of U(t) = sin(2t). Please solve this question and explain all the steps in detail.

System Peak Time and Overshoot

Please see the attached file for full problem description. I am not too sure how to go about solving this question. Any help would be appreciated.

Dynamic Behaviour of a System

Could you please simulate the dynamic behaviour of the system using matlab and simulink for the mass - spring system? Please refer to the attachment.

Source and load question for train hobby project

Have four circuits. One takes 9Vdc, two 5Vdc, and last one takes 12Vdc. Have variable transformer for source. How do I calculate or choose the voltage needed to run all four circuits with out blowing them all up, and at the same time run each circuit by themselves or two at a time or three, etc. How do I know how much curren

Theveninization of a transisor circuit

Find Icq and Vceq for the circuit when Beta=100. I put the 60k and 30 k resisters in parallel and then did a thevenin equivalence on the parallel combination resistance and the 20k ohm resistor. Then, I did kvl around the b-e loop and got icq=.021ma and vce=.39v. Did I do the thevinin equivalence correctly?

Heating Element

An electric heating element is connected to a 110 v circuit and a current of 3.2 A is flowing through the element. How much energy is used up during a period of 5 hours by the element? (a) 352wh (b) 550wh (c) 1,760wh (d) 2,580wh