- #1

Punchlinegirl

- 224

- 0

I really have no idea how to do this. I know that I have everything needed to find the total energy, but I don't really know how to get the charge from that. Can someone help?

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- Thread starter Punchlinegirl
- Start date

- #1

Punchlinegirl

- 224

- 0

I really have no idea how to do this. I know that I have everything needed to find the total energy, but I don't really know how to get the charge from that. Can someone help?

- #2

berkeman

Mentor

- 63,246

- 14,209

What is the equation relating Q, C and V? What is the equation relating C, epsilon, A and d?

- #3

Punchlinegirl

- 224

- 0

I figured it out... thank you.

- #4

Dyshie

- 1

- 0

horribly similar is: given only area of each plate, a distance between the plates, and instead, k = 1 (due to a vacuum as opposed to a slab), and the voltage, how would one find surface charge density (in Coulombs/meter^2)? I think i'm only confusing myself by changing various units around (such as volts to Joules/Coulomb)

So the work i've done so far includes:

I've noticed this should be relatively easy; the formula for density is simply just magnitude of the electric field multiplied with the surface area.

First I converted surface area from cm^2 to meters^2, I'm simply stuck on changing the charge difference from volts to coulombs :(

So the work i've done so far includes:

I've noticed this should be relatively easy; the formula for density is simply just magnitude of the electric field multiplied with the surface area.

First I converted surface area from cm^2 to meters^2, I'm simply stuck on changing the charge difference from volts to coulombs :(

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