All Questions
5
questions
2
votes
1
answer
187
views
Calculating the average of the square of the magnitude of an electric field
Let the sinusoidal electric field polarised in the $\hat{x}$ direction be $\overline{\mathcal{E}}(x, y, z, t) = \hat{x}A(x, y, z)\cos(\omega t + \phi)$, where $A$ is the amplitude, $\omega$ is the ...
- 4,322
1
vote
0
answers
35
views
Deriving force between continuous distributions of two volume charges without using infinitesimals
We know that force between two point charges is:
$$\vec{F}=k\ q\ q'\ \dfrac{\hat{r}}{r^2}\tag1$$
From here how shall we derive the equation for force between continuous distributions of two volume ...
- 1,141
0
votes
1
answer
123
views
Electric Field and Direction of Field
I want to measure the magnitude, and the direction of the electric field at point P induced by a rod that has a charge of $-22.0\mathrm{\mu C}$. The problem has been accurately dimensioned. The ...
- 2,653
1
vote
0
answers
301
views
Integral of Coulomb interaction over sphere
I am stuck evaluating an integral that appears in a simplified theory of nuclear binding energy. The nucleus is modelled as a sphere of radius $R$ with a continuous charge distribution, and the ...
- 143
1
vote
2
answers
4k
views
Calculating the electric field of a disk
I'm having trouble regarding how to calculate the electric field of a disk. Here's the scheme:
The exercise states that the disk is uniformely charged. This is what I did:
Density charge : $\sigma = ...
- 367