faradaycage

2.  HISTORY
 WHAT IS IT?
 FARADAY'S ICE PAIL EXPERIMENT
 OPERATION OF THE FARADAY CAGE
 EXAMPLES
 POPULAR CULTURE

3.  Is an enclosure formed by conductive
material.
 Used to block electric fields.
 Named after the English scientist Michael
Faraday, (1836)

4.  Michael Faraday observed
that the excess charge on
a charged conductor.
 To demonstrate this fact,
he built a room coated with
metal foil and allowed
high-voltage discharges
from an electrostatic
generator to strike the
outside of the room.

5.  Simple electrostatics
experiment .
 Demonstrates the effect of
electrostatic induction on a
conducting container.
 Faraday used a metal pail
made to hold ice.

6.  The operation of the Faraday cage is based on
the properties of a conductor in electrostatic
equilibrium. When the cage is placed in the
presence of an external electric field, positive
charges remain in the positions network;
electrons, however, that in a metal are free,
they begin to move because they act on a given
force by :

7.  Where e is the electron charge. As the electron charge is
negative, electrons move in opposite to the electric field
direction and although the total load of the conductor is
zero, one side of the cage (in which electrons are
accumulated) remains with excess negatively charged,
while the other side is a defect electron (positive charge).
This displacement causes loads inside the cage an electric
field in the opposite direction to the external field,
 As inside the cage no field, no charge can pass through;
therefore it is used to protect electrical charges devices.
The phenomenon is called electrical screening.

8.  Many devices we use in our daily lives are
equipped with a Faraday cage: microwaves,
scanners, cables, etc
 Other devices, without being provided with a
Faraday cage act as such, like: the
elevators, cars, airplanes, etc.
 For example for this reason it is
recommended to stay inside the car during a
lightning storm, its metal body acts as a
Faraday cage.

9.  Analytical chemistry to reduce noise
 Automobile and airplane passenger compartments
 A booster bag
 Elevators
 The scan room of a MRI
 Plastic Bags

10.  The X-Files (TV series)
 Better Call Saul (Tv series)
 Fringe (TV series)
 Person of Interest (TV series)
 Enemy of the State (Movie)
 Transcendence (Movie)
 The Darkest Hour (Movie)
 Mr. Robot (TV series)
 Doctor Who (TV series)

11.  HOW IT IS CALLED THE FIRST
EXPERIMENT OF ELECTROSTATICS?
 HOW IS THE PHENOMENON OF
PROTECTING ELECTRICAL CHARGES
CALLED?
 NAME THREE EXAMPLES OF FARADAY
CAGE,