Posted by **Anonymous** on Sunday, January 27, 2013 at 12:57pm.

A uniformly charged disk of radius 35.0 cm carries a charge density of 6.70 multiplied by 10-3 C/m2. Calculate the electric field on the axis of the disk at the following distances from the center of the disk.

(a) 5.00 cm

- physics -
**Elena**, Sunday, January 27, 2013 at 2:46pm
Take the ring of the radius ‘r’ and the width ‘dr’ on the disc.

The electric field at the distance ‘x’ from the center of the disc is

dE=x•dq/4πε₀• {sqrt(r²+x²)}³,

where dq=σ•dA = σ•2•π•r•dr.

E(x)=

=intergral(limits: from 0 to R)

{σ•2•π•r•x•dr/ 4πε₀• [sqrt(r²+x²)]³ =

=(σx/2ε₀)•{(1/x)- [1/sqrt(R²+x²)]}.

- and -
**balls**, Sunday, September 15, 2013 at 2:41pm
weiners

- physics -
**66yy6y6**, Thursday, November 20, 2014 at 3:11pm
rrtdfrt

## Answer this Question

## Related Questions

- Physics - A charged disk of radius R that carries a surface charge density σ...
- PHYSICS - A charged disk of radius R that carries a surface charge density ó ...
- PHYSICS - Consider a disk of radius 10 cm and positive surface charge density +3...
- Physics - Consider a disk of radius 10 cm and positive surface charge density +3...
- physics - A non-conducting disk of radius 10cm lies in the x = 0 plane with its ...
- physics - A circular disc of radius 'r' carries uniform charge distribution of ...
- Physics - A thin insulating thread of length L is attached to a point on the ...
- Physics - Consider a disk of radius 2.6 cm with a uniformly distributed charge ...
- physics - A compact disk player has just been turned off. A disk decelerates ...
- Physics Help - Charge is distributed uniformly along the x axis with density ßx ...