Thursday

August 21, 2014

August 21, 2014

Posted by **How many excess electrons must be distributed unif** on Wednesday, February 10, 2010 at 12:31pm.

- physics -
**drwls**, Wednesday, February 10, 2010 at 1:43pm1500 whats? Newtons per Coulomb?

Use Gauss' law.

The product of the area (pi D^2/6) and the E-field at the surface is equal to the total charge inside the sphere divided by the constant "epsilon-zero". Find that constant and compute the total charge. Divide that charge by the electron charge (e) to get the number of excess electrons.

It is not necessary that the electrons be distributed uniformly, as long as there is spherical symmetry.

- physics (correction) -
**drwls**, Wednesday, February 10, 2010 at 8:12pmThe surface area of a sphere is, of course,

A = 4 pi R^2 = pi D^2,

NOT what I wrote.

I was thinking of the volume, and then got the exponent wrong.

Use the area in Gauss' Law.

**Related Questions**

physics - (a) How many excess electrons must be distributed uniformly within the...

Physics - Consider an insulating sphere with 10 microCoulombs of charge ...

physics - Consider an insulating sphere with 10 microCoulombs of charge ...

pre ap physics - ** When s conducting sphere is charged positively, initially ...

physics - A charged paint is spread in a very thin uniform layer over the ...

+ --> a sphere --> (+) - Multiple Choice Help: ** When s conducting sphere...

Physics please HELP - Consider an insulating sphere with 10 microCoulombs of ...

Physics - 1)When two bodies are charged, the total charge before and after ...

PHYSICS - When a conducting sphere is charged positively, initially the charge ...

physics - A solid nonconducting sphere of radius 13 cm has a positive charge 9....