2014年2月23日 · Hi I want to know what is the diffrences between E=σ/2ε0 & E=σ/ε0 of course I know we use the first for a very huge page but what about the second... Insights Blog -- Browse All Articles -- Physics Articles Physics Tutorials Physics Guides Physics FAQ Math Articles Math Tutorials Math Guides Math FAQ Education Articles Education Guides Bio ...

2007年6月8日 · Are the dimensions correct in this equation: E=ρ/ε0 ? I don't think so since an electric field from a charge is given by: E = q/(4 pi ε0 r²) and since q/r² is no a charge density. This can also be looked at from physical point of view.

Question: A very long, uniformly charged cylinder has radius RR and linear charge density λλ. Part A Find the cylinder's electric field strength outside the cylinder, r≥Rr≥R. Give your answer as a multiple of λ/ε0λ/ε0. Express your answer in terms of some or all of the variables RRR, rrr, and the constant ππpi.

Question: ∇×B=μ0(J+ε0∂t∂E)∇×H=Jf+∂t∂D where B= Flux Density, J= Total Current Density, E= Electric Field where H = Magnetizing Field, lf = Free Current Density, D = Displacement Field a) Assuming the magnetostatic limit (dE/dt=0) and the media has a constant permittivity, derive integral forms of Ampere's law for both cases above using Stoke's Theorem.

2013年2月9日 · (a) What is the electric flux through the curved surface? (Use any variable or symbol stated above along with the following as necessary: ε0.) (b) What is the electric flux through the flat face? (Use any variable or symbol stated above along with the following as necessary: ε0.) Homework Equations The Attempt at a Solution

2011年2月8日 · Wow, I guessed using the idea that the total flux should be 0 because of symmetry (not sure if that's an okay assumption) and also figured that since the normal of the flat surface is 180 degrees of the electric lines coming in that the answer would be the negative of the curved surface because the curved surface's normals are parallel to the electric lines.

Select One of the Following: (a) |∆V | = σd/ε0 (b) |∆V | = 3d/4 3σ/2ε0 (c) |∆V | = Two infinite parallel planes of fixed charge density 2σ and −3σ are held a distance d apart as shown in the figure to the right.

2017年4月12日 · In the figure, R = 1.9 kΩ and ε0 = 60 V . When the switch is closed, the current through the inductor rises to 10 mA in 30 μs . What will the current in the circuit be after many time constants? Homework Equations I = V/R or I = ε/R if current is constant which after many time constants it should be correct? The Attempt at a Solution

In a medium characterized by θ= 0, µ = µ0, ε= ε0 and E ⃗=20 sin⁡(10^8 t-βz) y ̂ V/m. Find β and H ⃗ using Maxwell's equations. There are 2 steps to solve this one.

A uniformly charged ball of radius a and charge −Q is at the center of a hollow metal shell with inner radius b and outer radius c. The hollow sphere has net charge +2Q. Question: Determine the electric field strength in the region r≤a. Give your answer as a multiple of Q/ε0.