Recent content by minifhncc

Series shunt or series series?? Hello, I'm having trouble in general determining the feedback topologies... My guess is that this is series-series since the source is in series with Rf and since setting io=0 for the output loop disables Vf... But I'm not sure... Could someone please tell...

Hi, Just a general question. For an ideal opamp, does any current flow from its output terminal? What is the reasoning behind whatever the answer is? Thanks

I guess it's for 'large enough x' ie. for x>N for some N. It's actually Euler's limit that I'm trying to prove...

I'm trying to figure out how to prove this inequality: I know it's true (by graphing), but what's an algebraic way to prove it? 1+\frac{1}{3x^2}< x \tan \frac{1}{x} < \frac{1}{\sqrt{1-\frac{2}{3x^2}}} Thanks

Hello, Just a quick question... in which cases do I use the Biot–Savart law and Ampere's law? ie. in what cases is it easier to calculate the magnetic field with the laws? Thanks

Thanks for your reply... This is where I'm getting stuck :( ... So I should get q/2πɛz = two terms? Thanks a lot

Thanks for your reply. But I can't seem to be able to get this, especially the constant value (ie. 6)... Where does that come from?

Homework Statement [PLAIN]http://img841.imageshack.us/img841/5497/phys.jpg Capacitor has two cylinders (conducting), as shown. Charged 0V on LHS cylinder and 12V on the other one. d=140mm. Show the potential at P is Vp = 6-2.34ln((140-x)/x) Homework Equations E=integralE.dA...

But that's contrary to what you said before :S

Hi, Also, if the first coil produces a magnetic field of B, then the flux through each coil of the second coil would be BA, wouldn't it?

Then how does a transformer work? Because I think my Physics teacher said that the change in flux for each coil is the same, hence that's why the voltage can be stepped up...

I know that ∫B.dl = μI... but what does the quantity ∫B.dl mean/represent? Thanks

Hello, I've got a question regarding flux. Can you add flux contributions like you can add magnetic fields together? To illustrate my point, consider a single coil wrapped around a material that conducts flux. A 10 coil is wrapped around the same material. [like a transformer] When I...

(kQ/l) * integral of 1/x^2 from x=0.29 and x=0.43 = 8.9876* 10^9 * -22 * 10^-6 / 0.14 ... etc

Homework Statement A rod 14.0 cm long is uniformly charged and has a total charge of -22.0μC. Determine (a) the magnitude and (b) direction of the electric field along the axis of the rod at a point 36.0 cm from its centre. [I can do (b)] Homework Equations Electric field at the...