الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

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Lectures in General PhysicsIntroduction to Electrostaticمقدمة عن علم الكهربية الساآنةاكتشفت الكهربية الساكنة منذ600سنة قبل الميلاد عندما لاحظ عالم يوناني انجذابقصاصات من الورق إلى ساق دلك بالصوف.‏ ومن ثم توالت التجارب إلى يومنا هذالتكشف المزيد من خصائص الكهربية الساكنة ولتصبح الكهرباء عنصرا ً أساسيا ً فيحياتنا العملية.‏ في هذا الفصل سندرس باختصار بعض خصائص الكهربية الساكنة.‏Dr. Hazem Falah Sakeek
Introduction to ElectrostaticsWe have all seen the strange device, known as aVan De Graaff Generator, that makes your hairstand on end. The device looks like a bigaluminum ball mounted on a pedestal, and hasthe effect pictured on the right. Have you everwondered what this device is, how it works, whyit was invented, Surely it wasn't invented to makechildren's hair stand on end... Or have you evershuffled your feet across the carpet on a drywinter day and gotten the shock of your life whenyou touched something metal? Have you everwondered about static electricity and static cling?If any of these questions have ever crossed yourmind, then here we will be amazingly interestingas we discuss Van de Graaff generators and staticelectricity in general.1.1 Understanding Static ElectricityTo understand the Van de Graaff generator and how it works, you need tounderstand static electricity. Almost all of us are familiar with staticelectricity because we can see and feel it in the winter. On dry winter days,static electricity can build up in our bodies and cause a spark to jump fromour bodies to pieces of metal or other people's bodies. We can see, feel andhear the sound of the spark when it jumps.In science class you may have also done some experiments with staticelectricity. For example, if you rub a glass rod with a silk cloth or if you ruba piece of amber with wool, the glass and amber will develop a static chargethat can attract small bits of paper or plastic.To understand what is happening when your body or a glass rod develops astatic charge, you need to think about the atoms that make up everything wecan see. All matter is made up of atoms, which are themselves made up ofcharged particles. Atoms have a nucleus consisting of neutrons and protons.They also have a surrounding "shell" which is made up electrons. Typicallymatter is neutrally charged, meaning that the number of electrons andprotons are the same. If an atom has more electrons than protons, it isnegatively charged. Likewise, if it has more protons than electrons, it iswww.hazemsakeek.com
Page 2 and 3: LECTURES INGENERAL PHYSICSPart TwoE
Page 4 and 5: محاضرات في الفيزيا
Page 6 and 7: ContentsChapter (1) Electrostatic1.
Page 8 and 9: 4.5 Energy stored in a charged capa
Page 11 and 12: Introduction to ElectrostaticsPart
Page 13: Introduction to ElectrostaticsIntro
Page 17 and 18: Introduction to Electrostaticssame
Page 19 and 20: Introduction to Electrostatics1.2 P
Page 21 and 22: Introduction to ElectrostaticsRubbe
Page 24 and 25: Coulomb’s Lawقانون آولو
Page 26 and 27: Coulomb’s LawCoulomb’s lawقا
Page 28 and 29: Coulomb’s Law2.2 Calculation of t
Page 30 and 31: Coulomb’s Lawq 1 &q 3نتيجة
Page 32 and 33: Coulomb’s Lawx∑∑FFxy= 2 × 0.
Page 34 and 35: Coulomb’s LawExample 2.4A charge
Page 36 and 37: Coulomb’s LawExample 2.5Two fixed
Page 38 and 39: Coulomb’s Law2.3 Problems2.1) Two
Page 41 and 42: Lectures in General Physicsالكه
Page 43 and 44: Lectures in General PhysicsElectric
Page 45 and 46: 3.3 The direction of E rLectures in
Page 47 and 48: Lectures in General PhysicsExample
Page 49 and 50: Lectures in General PhysicsE y = E
Page 51 and 52: Notice that the rule of drawing the
Page 53 and 54: Lectures in General Physics3.8 Solu
Page 57 and 58: Lectures in General PhysicsE y = -E
Page 61 and 62: Lectures in General Physics3.10 Pro
Page 63: Lectures in General Physics3.16) Ch
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Electric FluxElectric Flux4.1 The E
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Electric Flux4.1 The Electric Flux
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Electric Fluxوالمقصود ب ne
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Electric FluxExample 4.2In figure 4
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Electric Flux1 q∴ E =(4.6)24πε
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Electric Flux4.7 Applications of Ga
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Electric FluxA linear charge distri
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Electric FluxAn insulated conductor
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Electric FluxFor r<aAaRrFigure 4.17
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Electric Flux4.8 Solution of some s
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المجالElectric Fluxلاحظ
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Electric FluxExample 4.7Consder a l
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Electric Flux4.9 Problems4.1) An el
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Electric FluxGauss’s law to find
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Lectures in General PhysicsElectric
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Lectures in General Physicsمثال
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Lectures in General Physics5.1 Defi
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Lectures in General Physics5.3 Elec
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Lectures in General PhysicsExample
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Lectures in General Physics5.4 Pote
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Lectures in General Physics5.6 The
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Lectures in General PhysicsSolution
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Lectures in General Physics5.9 Solu
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Lectures in General Physics5.9) Con
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Multiple Choice QuestionsPart 1Prin
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Lectures in General Physicsmkmmkmab
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Lectures in General Physicsy3 nC0.2
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Lectures in General Physicsdensity
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Lectures in General Physics[24] A s
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Lectures in General PhysicsEEFigure
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Lectures in General PhysicsQ. No. A
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Lectures in General Physicsالمك
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Lectures in General PhysicsCapacito
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Lectures in General Physics6.3 Calc
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6.3.2 Cylindrical capacitorLectures
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6.4.2 Capacitors in series:Lectures
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Lectures in General PhysicsAm4 4AgA
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Lectures in General PhysicsTherefor
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Lectures in General Physics2QW = U
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Lectures in General Physics(b) We f
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CQο οο= = = κ(6.20)VdVQοκQVο
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Lectures in General Physics2qF =2ε
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Lectures in General Physics6.23) A
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Lectures in General PhysicsCurrent
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Lectures in General Physics7.1 Curr
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7.5 Evaluation of the resistance of
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7.7.2 Resistors in Parallel:Lecture
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Lectures in General Physics(a) find
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Lectures in General Physics7.8 Solu
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Lectures in General Physicsheating
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Direct Current CircuitsDirect Curre
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Direct Current Circuits8.1 Electrom
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Direct Current Circuits8.2 Finding
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Direct Current CircuitsExample 8.1I
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Direct Current Circuits8.3 Kirchhof
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Direct Current CircuitsHints for so
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Direct Current Circuits+ξ 1 - IR 1
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Direct Current Circuitsthe current
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Direct Current Circuits8.5 Multi-Lo
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Direct Current Circuitsξ 1ξ 2abab
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Direct Current CircuitsExample 8.7I
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Direct Current CircuitsFrom equatio
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Direct Current CircuitsIn figure (c
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Direct Current Circuits8.6 RC Circu
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Direct Current CircuitsNote that th
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Direct Current CircuitsExample 8.11
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Direct Current CircuitsExample 8.14
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Direct Current Circuits8.7 Electric
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Direct Current Circuits8.7.3 The po
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Direct Current Circuits8.11) (a) Fi
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Direct Current Circuits8.22) Consid
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Multiple choice question for part 2
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Lectures in General PhysicsAPPENDIC
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Lectures in General PhysicsUndersta
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Lectures in General PhysicsThe posi
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Lectures in General Physicsيمر
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Lectures in General Physicsinexpens
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Lectures in General PhysicsBatteryB
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Lectures in General PhysicsThere ar
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Lectures in General PhysicsAPPENDIX
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Lectures in General PhysicsChapter
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Lectures in General PhysicsSI Deriv
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LengthMetric and Imperial Measures1
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Lectures in General PhysicsPeriodic
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Lectures in General PhysicsOpticsOp
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Lectures in General PhysicsAmerican
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APPENDIX (E)BibliographyLectures in
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APPENDIX (F)IndexLectures in Genera
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