Wednesday

August 27, 2014

August 27, 2014

Posted by **Monica** on Thursday, September 1, 2011 at 6:04pm.

Answer in units of N/C

Compute the ﬁeld from the near-ﬁeld approximation x ≪ R .

Answer in units of N/C

Compute the electric ﬁeld at a point on the axis and 31 cm from the center of the disk.

Answer in units of N/C

Approximate the ﬁeld by treating the disk as a +3.6 µC point charge at a distance of 31 cm.

Answer in units of N/C

This is what I know so far:

E=F/q=kQ/r^2

I started with E=(8.98755*10^-6)/(.0033 m)^2

E=2.97*10^9 N/C

I feel like I am missing a step. I know I use this idea though.

HELP! Thanks!

**Related Questions**

Physics C - A point charge of 5.5 µC is located at the center of a spherical ...

physics - Thunderstorms can have an electric ﬁeld of up to 341 × 10 ^5 N/...

physics - Two positive charges of 5.43 µC each are 508 cm apart. Find the ...

physics - Two positive charges of 5.43 µC each are 508 cm apart. Find the ...

physics - Two positive charges of 5.43 µC each are 508 cm apart. Find the ...

physics - A uniformly charged disk of radius 35.0 cm carries a charge density of...

Physics - A charged disk of radius R that carries a surface charge density σ...

physics - A plastic rod has been bent into a circle of radius R = 8.80 cm. It ...

physics - Three charges are located on a horizontal axis. 12 µC −0.8 µC 12...

Physics - An electron and a proton are each placed at rest in an electric &#...