Recent content by macca67

Hi Rude Man, thanks for the reply. In a) they ask for the laplace form of the input portion of the circuit, but they give Ip(s)=Ks(delta)x(s) in the text Have they not given me what they are asking for? or am i looking at it wrong? In terms of the output I am looking at the formula V=1/c...

Homework Statement FIGURE 4(a) represents a system to measure acceleration (i.e. an accelerometer). It shows a piezoelectric crystal that is connected to an amplifier and display via a length of coaxial cable2.A piezoelectric current is produced when the crystal is distorted by an applied...

ok, bn now sorted using integration by parts. Still having difficulty with an

One theory I have is when I use the trig rule, I change the sin(x) of the bn function to a cos then when I integrate it goes back to a sin, after integration should bn= (something) cos(something)?

Hi Guys, I am really struggling with this same question, here is what I have done so far, but there is a mistake (a few probably) in there and I can't find it! fx=Vsin (wt) x=wt So a0= 1/π∫f(x)dx = V/π∫sin (x) dx [lim π/2 to π] + V/π∫sin (x) dx [lim 3π/2 to 2π] So next I integrated the...

Yeah going on the post on the first page I got it right (Thanks to some coaching by gneill).

Also I couldn't get the spreadsheet to work on my work pc, used wolfram instead

Your final answer is different to mine, looking at V20(0.75+j0.05)=67.071+j30, you have a sign different somewhere in the build up to this. I don't want to post exactly what as I am new to the forum and I could be wrong and I am not sure what is acceptable to post in regards to solutions. In...

Got to the bottom of it, many thanks for your help!

Hi gneil, thanks for the reply. In Mesh one I have tried to justify my thinking but see the error now, thanks. In mesh two I put Vz4 as a positive as I think the +ve term would be at the top of z4. I started top left of the mesh and walked clockwise, -v3 as I come to the + side first, same...

Hi Folks, Sorry to revive an old thread but I am on the same unit and the notes are not helping me much! What I have so far is - Mesh 1 V1-(Vz1)-(Vz4)=0 V1-(I1Z1)-((I1-I2)Z4)=0 V1-I1(Z1-Z4)+(I2Z4)=0 120-I1(2+j5)-I2(-j5)=0 Mesh 2 -V3-Vz5+Vz4=0 -V3-Z5(I2-I3)+Z4(I2-I1)=0...

Hi Folks! I'm new, found this site while searching for some help, looks great! Hopefully people will be on here when I need a nudge in the right direction as my tutor isn't available as much as I need him! Thanks