Electric field in nonmagnetic material given a magnetic field

AI Thread Summary
The discussion centers on a problem involving the determination of electric field strength E in a nonmagnetic material subjected to a specified magnetic field. The original poster struggles with applying Faraday's Law, resulting in confusing outputs that do not yield meaningful solutions. Participants emphasize the need to correct the given formula due to dimensional inconsistencies in the exponential and cosine functions. They suggest working symbolically before substituting numerical values to avoid confusion. The conversation highlights the importance of ensuring proper dimensional analysis in electromagnetic problems.
PeterV
Messages
1
Reaction score
0
Homework Statement
Electric field from magnetic field
Relevant Equations
H = 50⋅exp(−100⋅x)⋅cos(2π⋅10⁹⋅t − 200⋅x)⋅ŷ
Hello, I am stuck on a problem that I don't quite understand, which looks like this:

"Given a nonmagnetic material with the magnetic field

H = 50exp(−100⋅x)cos(2π10⁹⋅t − 200⋅x)ŷ

determine the electric field strength E"

I don't understand how I am supposed to find the solution for this problem;
I have tried using Faraday's Law, but this only gives me some weird curl vectors that give me meaningless solutions, like partial derivatives of constants and things like that, and I cannot find any relationship between these fields that actually allow me to solve for E in a sensible way.
What is it that I am missing here?
 
Physics news on Phys.org
It's a good exercise to figure out, whether this problem is complete, i.e., if you can reconstruct the electromagnetic field ##(\vec{E},\vec{B})## from only the given information.

First of all, you should correct the given formula, which is inacceptable, because there are dimensionful quantities in exp and cos, and the argument of the latter adds a time to a length.

Last but not least: It's way more convenient to work with symbols first and only at the very end put numbers (or physical quantities with the correction dimensions!).
 
Thread 'Minimum mass of a block'
Here we know that if block B is going to move up or just be at the verge of moving up ##Mg \sin \theta ## will act downwards and maximum static friction will act downwards ## \mu Mg \cos \theta ## Now what im confused by is how will we know " how quickly" block B reaches its maximum static friction value without any numbers, the suggested solution says that when block A is at its maximum extension, then block B will start to move up but with a certain set of values couldn't block A reach...
TL;DR Summary: Find Electric field due to charges between 2 parallel infinite planes using Gauss law at any point Here's the diagram. We have a uniform p (rho) density of charges between 2 infinite planes in the cartesian coordinates system. I used a cube of thickness a that spans from z=-a/2 to z=a/2 as a Gaussian surface, each side of the cube has area A. I know that the field depends only on z since there is translational invariance in x and y directions because the planes are...
Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'
Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is(Figure 2): F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
Back
Top