sum(x^n/(n²+2n),n=1..infinity)
we've never heard of hypergeom functions and we encountered this on our exam. The question was not only the radius of convergence but the infinite sum as well.
Anyone an idea?
I've been thinking while studying physics and came up with the following problem:
A current I, starting at a point A, flows through a resistor with R=25 kΩ, a capacitor with C=4milliF, and an inductor with L=7 Henry to finish in point B. At a time when Q=8 milliC and the current I=0.2...
A capacitor is connected in parallel with a RL branch and a source providing a frequency omega=(LC)^(-1/2). What is the power factor, knowing that R=1000 Ohm, omega 2000 rad/s and L=1H?
Its not difficult to find C=0,25 microC and
XL=2000 Ohm
XC=2000 Ohm
but what to do next? How can I...
thank you!
so, from which I deduce that if the object was a dielectric it would have a different potential on the sides because the charges are not free to move. All they can do is shift a bit creating an electric field inside which does not cancel the field outside.
it must be that :(
I see there some induced charge on the right side and the equivalent opposite charge on the other side. My idea is that there should be an electric field created due to that separation. And if you are an electron and you travel through that field, you are passing through a...
A negatively charged sphere is brought near an uncharged metal object. Positive charges appear on the side of the uncharged metal object nearest to the charged sphere, negative charges on the opposite side.
http://140.247.57.206/galileo/lgm/pi/CT_images/l5b.2.gif
I don't understand how the...
We've got two concentric metallic spheres, let's say P and Q
P is the smallest one, so its inside Q
Q is grounded and P is positive charged
I figured out that the field in between P and Q is not homogeneous but constant. But why is the field outside Q zero while it is not inside Q...