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    Electostatics Electostatics Presentation Transcript

    •  Is the study of charged particles at rest.Two types of charges: 1.Positive Charge 2.Negative Charge
    • POSITIVE CHARGES  Proton  Electric lines of force is outward.  Charge : +1.6 x 10-19 C
    • NEGATIVE CHARGES  Neutron  Eclectic lines of force is inward.  Charge : -1.6 x 10-19 C
    • Two Laws of Charges: • Unlike Charges  Attract • Like Charges  Repel
    • Field Lines between opposite charged parallel plates** Field between plates is uniform **
    • When two different bodies are rubbedagainst each other, the electronsare simplytransferred from one body to another. No electron is destroyed nor createdOne body acquires a positive charge andanother body acquires an equal but negativecharge. Mathematically, we can state that thesum of positive and negativecharges duringthe process of rubbing is zero.
    • Is a material which allows charges to flow readily. Metals are good conductors becausethey have plenty of free electrons that moveabout the material Is a material that resists the flow of charges.  Rubbers, plastic, mica, paper, glass and air are insulators.
    • 1. Conduction is charging by contact between the neutralbody and the charging body.2. Induction  does not involve contact between theneutral body and the charging body.
    • 3. Rubbing If two objects are rubbed together, especially if the objects are insulators and surrounding air is dry,the objects acquire equal and opposite charges and anattractive force develops between them. 4. Polarization  When a negatively charged object comes near neutral object and the charges in the neutral objectsplit on two different sides of the surface with thepositive charge closer to the negatively charged object.
    •  is a device for determiningthe kind of chargeof a body.  may be chargedeither by conduction orinduction.
    •  Charles Augustin de Coulomb F=k q1 q2 d2Where: q1 and q2 are the magnitudes of the charge d is the distance F is the electric force k is the Coulomb constant ( 9 x 10 9 Nm2/c2 )
    • region in space where electricforces act on charges Has the property that any chargedparticle placed in it will experience anelectric force.  Vector quantity
    • Formula: E = F/qWhere:E = Electric Field Strength (N/C)q = amount of chargeF = force on charge