Electrostatic Ppt Eng

8/10/2019 Electrostatic Ppt Eng

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ELECTROSTATIC

CATUR ANGGORO AJI SMP GANDHI NASIONAL


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Daftar Isi

Listrik Statis

Hukum Coulomb

Elektroskop Generator Van De Graaff



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ElectrostaticElectrostatics is the study of electric charge

which is not movingFirst person who did the experiment about

electrostatic is Thales(Greek)

He rub amber stone with wool then heapproached it to the feather and thefeather flew and patched to the amberstone for a moment.

awal



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Atom

Atom is the smallestpart of an elementwhich still has thecharacteristic of the

element

Atom consists of smallerparticles which has itsown characteristic.

The particles are proton,neutron in core ofatom and electronwhich orbit around the

core of atom withcertain ath.

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Atom

Proton has positivecharge and electronhas negative chargewhile neutron has

neutral charge.

The amount of protonand electron chargeare same.

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AtomNeutral atom has the

same amount ofproton and electroncharge.

Atom which hasnegative electriccharge if the atomconsists of manyelectron then proton.

And atom which haspositive electriccharge if lack ofelectron.

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Atom Netral

Neutral atom has thesame amount ofproton and

electron.

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Atom Negatif

If an atom get theelectron fromanother atom so

the atom will beoverload ofelectron andbecome negative

charge.

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Atom Positif

If an atom lost itselectron so theatom will lack of

electron andbecome positivecharge.

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Menggosok dua jenis benda

Two certain objects if we rub themeach other so both of the will be hadelectric charge.

Example: balloon with wool

Glass with silkmica with wool

mica with silk

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Balon dengan Kain Wol

Balloon if we rub withwool so the electronis moving from the

wool to the balloon.So that the balloon

has negative chargeand wool has

positive charge.

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Kaca dengan kain sutra

If we rub glass withsilk, the electronmoves from glass to

the silk.So that the glass

becomes positivecharge and silk

becomes negativecharge.

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Menginduksi dengan BendaBermuatan Listrik

Beside byrubbing, anobject can begiven electriccharge byinducting withanother objectwhich has

electric charge.

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Sifat Muatan Listrik

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Sifat Muatan Listrik

Two electric charge object havecharacteristic:

- if the charge is same it willrepulsive each other.

- if the charge is different it willattractive each other

- neutral object always will beattracted by electric charge object.

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Hukum Coulomb

Repulsive Force or Attractive Forcebetween two electric charge objectwe call it Coulomb Force as the

award for Charles Augustin deCoulomb, French physicist that to bethe first people who research electricforce and formulate it

mathematically.

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Hukum Coulomb

Coulombs law can be formulated tobe:

F = kQ1.Q2

d

Notes: F =Coulomb Force (N)Q = Electric charge ( c )d = Distance between two

electric charge (m )

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Gaya Coulomb Sebanding denganmuatan listrik

Coulomb Forcebetween twocharge will be

change to bedirectlyproportional if

their charge ischange too.

Q1 F Q2

Q1 F Q2

F = FQ1.Q2Q1.Q2

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Gaya Coulomb berbanding terbalikdengan kuadrat jarak kedua muatan

Coulomb Forcealso will bechange if the

distance betweentwo charge arechange too.

dF

d

F

F=( ) Fd 2

d

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Elektroskop

Electroscope is adevice that is usedto detect the

existence of electriccharge in an object.

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Menentukan bendabermuatan listrik

To detect theexistence of electriccharge in an object

there is or not, wecan approach thatobject to the neutral

electroscope.

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Menentukan jenismuatan listrik suatu

benda

Jenis muatan listriksuatu benda dapatdilakukan dengan

cara mendekatkanbenda tersebut keelektroskop

bermuatan listrik

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Generator Van de Graaff

Generator van degraaff is agenerator whichproduce hugeelectrostatic.

Silinder logam

Silinder politen

Sabukkaret

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Terjadinya Petir

Lightning can behappened because leapof electrons fromnegative charge cloud to

the ground that haspositive charge.

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Penangkal Petir

Penangkal petir

merupakan alat pengarahpetir agar petir hanyamenyambar kepadanya,bukan ke bagianbangunan lainnya

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Electric Field (E) as a region of spacein which an electric chargeexperiences a force.

If an object that has electric charge is put ina space ,so in that space will has Electric

Field. If another object that has electric charge is

put in that space, So both of them will

experiences a force


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If the electric charge is same, the Force that

will be happened is Repulsive Force.

If the electric charge is different, the Force that will be

happened is Attractive Force.

Electric Field is shown by Electric Field


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Electric Field is shown by Electric FieldLines which the direction is away frompositive charges to negative charge.

The electric field is stronger closer to the

charge (the electric field lines are closer

together) and weaker further from the

charge (the electric field lines are furtherapart).

The magnitude of the electric field at a

point as the force per unit chargeE = F/q


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1.Calculate the electrostatic force between

two charges of +6nC and +1nC if they areseparated by a distance of 3mm.

2.Calculate the distance between two

charges of +4nC and

5nC if theelectrostatic force between them is0,005N.

3.Calculate the charge on two identicalspheres that are similarly charged if they areseparated by 6 mm and the electrostatic forcebetween them is 0,006N.


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4. Charge A = 6 nC, Charge B = 1 nCCalculate the electric field at Charge A, with

r = 3 mm.

5.Charge A = 4 nC, Charge B = -5 nC,

Calculate the electric field at Charge B

which influenced by Charge A. with r from

your answer no.2!!!!

Electrostatic Ppt Eng

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