Electromagnetism Flashcards
Two types of charges
Positive and negative
Is produced when an imbalanced of electrical charges
Electricity at rest
Static Electricity
Greek word of electricity
Elekton: Amber
Famous for experiments like flying kites during thunderstorms
Benjamin Franklin
Classified charges, either positive or negative
Benjamin Franklin
Discovered electrons (negative charge)
JJ Thomson
Discovered protons (positive charge)
Ernest Rutherford
Charges are measured in
Coulombs
Occurs when an external charge sphere is placed near the neutral sphere; attraction occurs
Charge separation
Has same amount of protons and electrons
Neutral sphere
An objects sum of the number of electrons and protons
Net charge
Chemical property of an atom to attract electrons itself
Electron Affinity
Ranks materials based on their tendency to acquire charge
Triboelectric series
This charge particle has the ability to transfer from one object to another
Electrons
Electrons are transferred when objects are rubbed against one another
Charging by rubbing
Charging by Friction
States if the object is neutral, negatively charged, or positively charged
Net charge
It allows the flow of charges, especially electrons
Conductors
It resists the flow of electrons
Insulators
Atoms are made up of three subatomic particles namely:
Protons, electrons, and neutrons
Unlike charges
Attract
Like charges
Repel
A charged object is touched to a conductor
Charging by contact
Charging by conductor
Explain charging by conduction
When a good sphere conductor is placed near a negatively charged rod, electrons will then move from rod to sphere. After separation, both will obtain negative charges.
Happens due to induced charges. No contact between two materials
Charging by induction
Explain charging by induction
The charges in a conducting
object can be rearranged with the presence of an external charged object.
Two methods of charging an object
- Charging by Friction
- Charging by induction
Can happen when you rub two objects with unequal electronegativity. The object with higher electronegativity will be
negatively charged, and the other object with lower electronegativity will be positively charged.
Charging by Friction
The algebraic sum of all the electric charges in any closed system is constant
The charge is being conserved; cannot be created nor destroyed
Law of Conservation of Charge
Changes in charges are brought by the movement of
Negatively charged particles
