E-field Definition and 180 Threads

Homework Statement Given the magnetic field intensity, H, find E. H=\hat{y}6cos(2z)sin((2x10^7)t - 0.1x) Homework Equations \nabla \times E = \frac{- \partial B}{\partial t} The Attempt at a Solution Since we have H, we can use the relationship that \muH = B and then take the...

Not just free electrons, ALL electrons. How strong would that be?

[SOLVED] E-field with charges I've tried this 8 times and have 2 tries left, Looking for some hints Homework Statement The figure shows the E-field in the plane of two point charges. (Give ALL correct answers, i.e., B, AC, BCD...) A) Q1 is positive. B) A - charge placed at `a' would move...

Homework Statement Determine the field at the center of curvature of an arc of arbitary angle \alpha (\alpha is with the x-axis) Homework Equations E=\frac{kQ}{R^2}\widehat{r} S=R\alpha \lambda=\frac{Q}{S} The Attempt at a Solution I divide the arc into small pieces ds...

[SOLVED] Gauss and E-Field Homework Statement http://img443.imageshack.us/img443/9452/eletroof9.th.png My main problem with this problem is finding the electric field at Point 2 (P2) Homework Equations The Attempt at a Solution I derived the electric field using Gauss's Law for a...

Homework Statement I have a slab of conductor on the ground with thickness, a, and it extends in all directions infinitely. Then I have a slab of insulator above the conductor of thickness, a, and it also extends infinitely in all directions. The two slabs are a distance, 2a, from each...

[SOLVED] E-field at the center of a semicircle Homework Statement Calculate E at center of semicircle: A uniformly charged insulating rod of length L = 12 cm is bent into the shape of a semicircle as shown. The rod has a total charge of Q = -6 nC. Find the magnitude of the electric...

When an electric field is high enough, electrons are not so easily confined to molecules or atoms. This has been the basis of field ionization for mass spectrometry. But what if the field is not enough to ionize, but close. Would it be easier to ionize the atom or molecule with less energy? Any...

Homework Statement Find the electric field a height z above a square of side length a with uniform surface charge \sigmaHomework Equations The Attempt at a Solution E=\frac{z\sigma}{4\pi\epsilon_0}\int^{a/2}_{-a/2}\int^{a/2}_{-a/2}\frac{dx dy}{(x^2+y^2+z^2)^{3/2}} (in the z direction)...

Can a hollow cylinder of known radius, height and charge be treated as a line of charge if one is trying to find the E-field at an arbitrary perpendicular distance from the center of the flat surface?

Hi! When a charge/current moves in a closed loop, a magnetic moment is generated. Is there any formula for connecting the magnetic moment to E-field and B-field? Patrick

Homework Statement Assuming equal masses, how would the detection times of 3H+ and 3He+ compare [as they're both accelerated toward a detector in the direction of a constant E field]? A) 3H+ would have a longer flight time than 3He+. B) 3H+ would have a shorter flight time than...

E-field due to a large circular plane of uniform distribution! Hi Imagine i have a circular disc of radius R with uniform charge density, and a small charge x meters away from its center. The idea is to calculate the e field for this charged disc on the small charge. I can solve this problem...

Homework Statement Image: http://img.photobucket.com/albums/v696/talimtails/PP23.jpg A particle with unknown mass and charge moves with a constant speed v = 1.9 x 10^6 m/s as it passes undeflected through a pair of parallel plates, as shown above. The plates are separated by a distance d...

Homework Statement Right have a shell that has a volym charge distribution P=(G/r^2) and with inner radius a and outer radius b. Now what is the e-field at r<a, a<r<b, r>b Homework Equations gauss's law: surfaceint[E.da]=Qenclosed/epsilon0 Qenc=volymint[PdV) The...

i'm in a bit of a tizzy with an optics class question... it goes like this: under the application of a time varying electric field the induced polarization in a dielectric may be described by the equation: P = [(Ne^2)/(-m(omega)^2-im(omega)(gamma)+k)][E+(1/3(permittivity))P] where the...

ballistic particle and electric field Throughout space there is a uniform electric field in the -y direction of strength E = 450 N/C. There is no gravity. At t = 0, a particle with mass m = 5 g and charge q = -11 µC is at the origin moving with a velocity v0 = 35 m/s at an angle q = 25° above...

We are asked to show that we can have a "spatially uniform E-field" in a conductor according to E=Eo*exp(-t/tau) where tau=ErEo/sigma where Er is the relative permittivity and sigma is the conductivity. I know we need to use curl(H) = ErEo*dE/dt + sigma*E and for some reason we say that...

I've solved an electrostatics problem where we have to find the surface charge density on a conducting sphere in a previously uniform E-Field, but I had to assume that V=0 on the surface of the cylinder, and I'm not sure why this is the case. I know that E=0 inside, so the potential should be...

I have a positive and a negative charged plate running parallel to one another. To find the Electric Field to the left of the plates, I say: E dot dA = Qenclosed / permittivity Then E times 2pi(r) = Qenclosed / Permittivity then E = Qenclosed / 2pi(r) x Permittivity and since Qenclosed...

Hi, My Question: If the peak value of the magnetic field of an EM wave is 2 x 10^-7 T. Calculate the peak value of the E-field. Work: C=E/B so, 3*10^8 m/s=(E)/(2*10^-7 T) (3*10^8 m/s)(2*10^-7 T)=E E= 60 N/C Is this right ? Thank You

Figure 24-27 gives the electric potential V as a function of x. Figure (a) Rank the five regions according to the magnitude of the x component of the electric field within them, greatest first (use only the symbols > or =, for example 2=4>1=3>5). I got the other 2 parts (b) and (c)...

Hey all, I'm a bit confused over an experiment in which we mapped Equipotential Surfaces to then use to draw Electric Field lines using electrodes placed into water to act as a dipole. Along with this, we also had to place a circular conductor and insulator (both uncharged) into the water as...

Hello everyone. I'm having troubles figuring out the E-field of two long, charged, thin-walled, concentric clyinders. Its question #6 on the picutre. The image has my work, it seems my apporach was too simplistic, because the problem gives you 2 radi, but then gives u another 2 radi to find...

ok, I have an exam on Monday and I know the prof is going to give a problem where we have inner solid sphere of uniform charge density (+), and this sphere is surrounded by an outer spherical shell with a uniform surface charge density (-). He wants us to calculate the e-field "everywhere" with...

ok, so I have a physics test monday, and I know the prof will make us calculate the e-fields, and voltages everywhere is space produced by various objects with uniform charge densities using Gauss's law. So, he wants us to derive a general expression that describes the e-field and voltage...

Three very large sheets are separated by equal distances of 20.0 cm (Fig. 22-42). The first and third sheets are very thin and nonconducting and have surface charge densities of +6.50 µC/m2 and -6.50 µC/m2, respectively. The middle sheet is conducting but has no net charge...

ifthis is an infinitely long cylinder how can i derive an equation for finding the magnitude of the electric field? i have the answer which is E=2*pi*rho*K*r but i don't understand how they got it.

I need to calculate the electric field both inside and outside a sphere with a charge density p. The trick is I am required to use Coulomb's Law. I cannot appeal to Gauss' Law. My instructor suggests considering the electric field due to a ring of charge. Then to use that result to find...

[SOLVED] E-field question I'm new here but hope that's not a problem. I have an e-field problem that i was wondering about. Now this is how it was presendetd to me. A charge of uniform density 4.0 nC/m is distributed along the x-axis from x=-2.0 m to x=+3.0m. What is the magnitude of...