Recent content by craka

sorry, thanks for clearing that up matlab.

The way I understand it, thevenin circuit is the equivalent open circuit voltage and the resistance/impedence seen looking in from the terminals. In this problem to work out your thevenin resistance, you are given the current that flows and the voltage across the terminals when the circuit is...

If I convert to the frequency domain and have my voltage as my zero phase reference it shouldn't matter should it? ie voltage 7.071 V @ 0degrees I thought what I tried was mesh loop analysis.

Homework Statement Determine I1 independent AC voltage source 10 cos 10^5t inductor 60mH capacitor 5nF dependent voltage controlled voltage source 3Vx Homework Equations KVL & KCL The Attempt at a Solution \begin{array}{l} - 7.071 + 6000I_1 - j6000I_3 = 0 \\...

No worries. It's just great that you people put your time in a forum such as this. Thanks

ot sure if this helps or hinders. But there is Wien's Law that allows you to determine Peak wavelength for a given temperature in Kevin ie \lambda _{peak} T = 2.90 \times 10^{ - 3} meters.Kelvin The energy gap is the energy required by a semiconductor needed before starting to...

Thanks borgwal, that made it pretty damn easy. Qencl= permitivity of free space * electric flux

Sorry I do realize the units should be in Coulombs I just in autopilot when I was typing units in sorry. As far as the Areas goes, that what I thought initially aswell. When I calculated the surface area initially I did so for a cube. Thus 6x^2 where x was side dimension of cube. ie the...

Homework Statement Question states "Total electric flux from a cubical box 0.28m on a side is 1.84x10^3 Nm^2/C. What is the charge enclosed by the boxHomework Equations Gauss's Law \begin{array}{l} \phi _E = \vec E \bullet \vec A \\ \oint {\vec E \bullet d\vec A = \frac{{Q_{enclosed}...

Should I than from finding vector <1, -2, 1> do the cross product of it and the direction vector of the line <3,2-1> and than try and find the Cartesian equation of plane ?

By doing the cross product of the direction vectors of r=<5,0,0>+s<2,1,0>+t<-1,0,1> am I not find a vector perpendicular to the plane?

Homework Statement Question states "The plane that contains the line r=<-2,4,3>+t<3,2-1> and is perpendicular to the plane r=<5,0,0>+s<2,1,0>+t<-1,0,1> is:" Answer is y+2z=10 Homework Equations Cross product and dot product of vectors The Attempt at a Solution I found a...

Homework Statement It seems to be obvious. But would like to check that for a line to be contained in a plane it needs to be parallel. Correct? Homework Equations The Attempt at a Solution

I still haven't been able to do this. I tried to do with cross product of <0,1,2> x <-1,2,1> to get vector normal , which was <-3,-2,1> than did <-3,-2,1> . < x- (-1), y-2, z-1 >=0 which worked out to be -3x-2y+z=0 however this is not the answer still.

Homework Statement Question is "The Cartesian equation of the plane containing the line x=3t , y =1+t , z=2-t and passing through the point (-1,2,1) is?" Homework Equations \begin{array}{l} n \bullet (r - r_0 ) = 0 \\ < n_1 ,n_2 ,n_3 > \bullet < x - x_0 ,y - y_0 ,z - z_0 >...