# Formula to calculate the charge in a sphere

1. The problem is: Which charge will a sphere have if it has a diameter of 0.26 meters and produces an electric field of 1030 N/C in the surface?

2. Gauss Law

3. I need the charge of the sphere but i couldn´t find any formula to calculate the charge given the distance (r) and electric field (E)

Chandra Prayaga
You are supposed to use Gauss's law. So what does Gauss's law say?

Is this formula:
E=((1)/(4(3.1416)(8.85X10^-12)) ((q)/(r)^2)

But what is the formula to calculate the q, the charge given the E (electric field) and r (distance)

kuruman
Homework Helper
Gold Member
Is this formula:
E=((1)/(4(3.1416)(8.85X10^-12)) ((q)/(r)^2)

But what is the formula to calculate the q, the charge given the E (electric field) and r (distance)
The idea is for you to use Gauss's law to find the formula that you need. That's what @Chandra Prayaga indicated in post #2.

Chandra Prayaga