Based on the last experiment, where two spheres were charged by induction, we can conclude that

The figure below shows a positively charged rod near a

Because the electric force decreases with distance, the

attractive force on the electrons at the top surface is

than the repulsive force on the ions at the

The net force toward the charged rod is called a

The figure below shows how a neutral atom is polarized

by an external charge, forming an

charge, all the individual

atoms inside the insulator

polarization force toward

Charging by Inducon, Step 1

Charging by Inducon, Step 2

Charging by Inducon, Step 3

Metal spheres 1 and 2 are touching. Both are initially neutral.

a. The charged rod is brought near.

b. The charged rod is then removed.

c. The spheres are separated.

Afterward, the charges on the

Metal spheres 1 and 2 are touching. Both are initially neutral.

a. The charged rod is brought near.

b. The charged rod is then removed.

c. The spheres are separated.

Afterward, the charges on the

Metal spheres 1 and 2 are touching. Both are initially neutral.

a. The charged rod is brought near.

The spheres are separated.

c. The charged rod is then removed.

Afterward, the charges on the

Metal spheres 1 and 2 are touching. Both are initially neutral.

a. The charged rod is brought near.

b. The spheres are separated.

c. The charged rod is then removed.

Afterward, the charges on the

Net charge is obtained if contact is

broken while the spheres are polarized.

Based on the last experiment, where two spheres were

charged by induction, we can conclude that

Both the + and – charges move.

We can draw no conclusion

about which charges move.

Based on the last experiment, where two spheres were

charged by induction, we can conclude that

Both the + and – charges move.

We can draw no conclusion

about which charges move.

Identical metal spheres are initially charged as shown.

Spheres P and Q are touched together and then separated.

Then spheres Q and R are touched together and separated.

Identical metal spheres are initially charged as shown.

Spheres P and Q are touched together and then separated.

Then spheres Q and R are touched together and separated.

object used to charge it.

The first charge is strong but

each time the electroscope

original object giving up some

charge every time it is touched.)

The first charge is strong and

electroscope is recharged. 

is due to the original object not

losing any charge in the process.)

Introducon to Electrostacs

Explore stac electricity:

hp://phet.colorado.edu/new/simulaons/sims.php?sim=Ball

oons_and_Stac_Electricity

The negave charge at the boom of the cloud induces a

posive charge at the surface of the ground.

The lightning strikes: electrical charges flow through the

In 1752 in his famous kite

invented the lightning rod.

Many tried to repeat Franklin’s

experiments and were electrocuted.

Franklin isolated himself and

Electrostac Force and Coulomb’s