- #1

- 17

- 0

i want to know why can't we use Gauss law to calculate the electric flux density of a charged disk?

and how to calculate it "everywhere"? as coulomb's law calculates it at a certain point only...

- Thread starter mazen_zone
- Start date

- #1

- 17

- 0

i want to know why can't we use Gauss law to calculate the electric flux density of a charged disk?

and how to calculate it "everywhere"? as coulomb's law calculates it at a certain point only...

- #2

- 35,847

- 4,664

You need to realize when Gauss's Law are typically used - in highly-symmetric situation where you can construct a Gaussian surface that will have an electric flux that is either a constant, or zero. When you can do that, then using Gauss's Law will be quite easy. If not, it is seldom solvable in closed form mathematically.hey everyone...

i want to know why can't we use Gauss law to calculate the electric flux density of a charged disk?

That's not right. You CAN use Coulomb's law to calculate the field at any point - it doesn't mean you can solve it EASILY. Again, because of the lack of symmetry, calculating at field points off the axis of symmetry will make the solution more involved (you will end up with an infinite series since there may be no closed form of the solution). When you get to a graduate level E&M course using texts such as Jackson, you WILL learn how to solve this using "Coulomb's Law", i.e. using Green's function technique to solve the Poisson's equation.and how to calculate it "everywhere"? as coulomb's law calculates it at a certain point only...

Zz.

- #3

- 17

- 0

correct me if I'm wrong...

- #4

- 35,847

- 4,664

I have no idea what you just said.

correct me if I'm wrong...

Coulomb's Law IS a "general formula" to calculate E-field.

Zz.

- Last Post

- Replies
- 1

- Views
- 692

- Replies
- 8

- Views
- 13K

- Replies
- 1

- Views
- 565

- Last Post

- Replies
- 5

- Views
- 4K

- Last Post

- Replies
- 2

- Views
- 2K

- Replies
- 5

- Views
- 13K

- Last Post

- Replies
- 4

- Views
- 9K

- Last Post

- Replies
- 6

- Views
- 2K

- Last Post

- Replies
- 4

- Views
- 5K

- Last Post

- Replies
- 2

- Views
- 1K