Massachusetts Institute of Technology
Sign in | Create Account

Faraday's Cage

In the electric field of a Van de Graaff generator, an unprotected Ben Franklin feels electrostatic forces. However, when a metal cage surrounds him, he is completely shielded against any electricity or electrostatic force.

This is due to the fact that all charges in a conductor reside on the outer surface, and always rearrange themselves to cancel out the electric field in the interior.

Comments (8)

Ótimo para demonstração em aulas de física.
Obrigado pessoal do MIT.
Jefferson Chase

Posted 5 years by Anonymous

i wanted to be the first! :(

Posted 5 years by Anonymous

hula tiula kkakak ddii..
- thats another comment in Greek and Latin for you…

On a more serious note, would sincerely request you to permit comments in English only. I’m from India and I just don’t understand why people who speak some European language must insist on getting their views across only in their own language. Why cant they speak English like the rest of us?

PS: Your video is great. Keep up the good work!


Posted 5 years by Anonymous

Hi Parag, We want to try to keep the site as open as possible. You can always do what I do and use Google Translation to see what they’re saying. The fun part is guessing what language it is. :)

Posted 5 years by brew

If everything was done in English where would be our cultures by now? That was written in Portuguese, by the way.

Posted 5 years by Anonymous

Who cares!?!? the videos great!

Posted 5 years by Anonymous

Posted 6 months by Anonymous 00:00:00


Posted 28 days by Anonymous 00:00:32

You need to log in, in order to post comments. If you don’t have an account yet, sign up now!

February 24, 2009 14:43
Creative Commons Attribution-NonCommercial (What is this?)
Additional Files

59413 times

More from MIT Department of Physics Technical Services Group

Two Dimensional Collisions

Two Dimensional Collisions

Added almost 5 years ago | 00:01:19 | 43851 views

MIT Physics Demo -- Microwave Interference

MIT Physics Demo -- Microwave Inter...

Added almost 6 years ago | 00:02:11 | 26366 views

Ripple Tank: Interference of Two Point Sources

Ripple Tank: Interference of Two Po...

Added almost 5 years ago | 00:01:41 | 45783 views

Coupled Air Carts

Coupled Air Carts

Added almost 5 years ago | 00:07:38 | 47854 views

Fiber Optic Bundle

Fiber Optic Bundle

Added almost 2 years ago | 00:01:20 | 3630 views

Change in Frequency of Voice with Helium

Change in Frequency of Voice with H...

Added over 1 year ago | 00:02:52 | 3547 views