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Science: Topics Electromagnetism (view source)
Revision as of 06:27, 24 August 2012
, 06:27, 24 August 2012→Electric Charge, Conductors and Insulators
unlike charges attract each other. '''
unlike charges attract each other. '''
[[File:CIC_1.png]]
This attraction or repulsion is a result of forces
This attraction or repulsion is a result of forces
that these charges exert on each other. This force, operating
that these charges exert on each other. This force, operating
[[File:Electromagnetism_%20Resource_Material_Subject_Teacher_Forum_September_2011_html_m1ba34f6e.png]]
[[File:Atom Structure1.png]]
Electrons
Electrons are the smallest and lightest of the particles in an atom. Electrons
are the smallest and lightest of the particles in an atom. Electrons
are in constant motion as they circle around the nucleus of that
are in constant motion as they circle around the nucleus of that
atom. Electrons are said to have a negative charge, which means that
atom. Electrons are said to have a negative charge, which means that
[[File:Electromagnetism_%20Resource_Material_Subject_Teacher_Forum_September_2011_html_7fb72f41.png]]Protons
[[File:Atom Structure2.png]]
are much larger and heavier than electrons. Protons have a positive
Protons are much larger and heavier than electrons. Protons have a positive
electrical charge. This positively charged electrostatic field is
electrical charge. This positively charged electrostatic field is
exactly the same strength as the electrostatic field in an electron,
exactly the same strength as the electrostatic field in an electron,
[[File:Electromagnetism_%20Resource_Material_Subject_Teacher_Forum_September_2011_html_51ef531a.png]]The
[[File:Atom Structure3.png]]
electrostatic force exerted by the positive nucleus on the negatively
The electrostatic force exerted by the positive nucleus on the negatively
charged electrons is what keeps the electrons as a part of the atom.
charged electrons is what keeps the electrons as a part of the atom.
Otherwise, the force that the electron will develop when it is moving
Otherwise, the force that the electron will develop when it is moving
[[File:Electromagnetism_%20Resource_Material_Subject_Teacher_Forum_September_2011_html_f783dcf.png]]When
[[File:Induction_Charging.png]]
an electrically charged object is brought near an uncharged object
When an electrically charged object is brought near an uncharged object
(the object must be a conductor), a distribution of charge happens in
(the object must be a conductor), a distribution of charge happens in
the uncharged object. The end of the uncharged object which is
the uncharged object. The end of the uncharged object which is
[[File:Electromagnetism_%20Resource_Material_Subject_Teacher_Forum_September_2011_html_m2d4a26f1.gif]]
[[File:Coulombslaw.gif]]
# [[Science Object - Electricity]] This isa very good interactive session on electrostatics and current electricity. You can register at [[www.nsta.org]] for free and view all these science objects and many free materials in your online library.
# [[Science Object - Electricity]] This isa very good interactive session on electrostatics and current electricity. You can register at [[www.nsta.org]] for free and view all these science objects and many free materials in your online library.
# [[How lightning strikes]] This page describes how lightning strikes and how lightning conductors work.
# [[How lightning strikes]] This page describes how lightning strikes and how lightning conductors work.
= Electric Field =
= Electric Field =