SILABUS

Satuan Pendidikan : SMP Negeri 1 BangliMata Pelajaran : IPA/FisikaKelas/semester : VII/1Waktu : 2 jam pel.

Standar Kompetensi 3. Memahami konsep kelistrikan dan penerapannya dalam kehidupan sehari-hari

Kompetensi Dasar Materi Pembelajaran

Kegiatan Pembelajaran Indikator

Penilaian Alokasi waktu

Sumber BelajarTeknik Bentuk

Instrumen Contoh Instrumen

3.1 Mendeskripsikan muatan listrik untuk memahami gejala-gejala listrik statis serta kaitannya dalam kehidupan sehari-hari.

- Muatan listrik;- Jenis muatan

listrik;- Sifat muatan

listrik;- Eletroskop;- Hukum Coulomb;- Potensial listrik.

- Eksperimen di Lab. tentang muatan listrik

- Eksperimen di Lab. tentang elektroskop

- Diskusi tentang teori elektron;

- Menyebutkan contoh cara memuati benda menjadi bermuatan listrik;

- Menyebutkan jenis muatan listrik;

- Menyebutkan sifat-sifat muatan listrik;

- Menjelaskan fungsi elektroskop;

- Menjelaskan hukum coulomb;

- Menjelaskan tentang potensial listrik.

- Tes tulis;- Unjuk

kerja.

- PG- Rubrik

penilaian.

Sebuah benda akan bermuatan positif bila . . . .a. kelebihan

elektronb. kekurangan

elektronc. kekurangan

protond. jumlah proton

sama dengan jumlah elektron

6 jam pel.

- BSE (2008)- Ilmu

Pengetahuan Alam untuk SMP Kelas IX; (Pusat Perbukuan Depdiknas 2008)

- IPA Fisika Bilingual (Yrama Widya. 2008).

SYLLABUS

Satuan Pendidikan : SMP Negeri 1 BangliMata Pelajaran : IPA/FisikaKelas/semester : VII/1Waktu : 2 jam pel.

Competence Standard: 3. Understanding the electrical concept and its implementation in daily life;

Basic Competence Learning Materials Learning activities IndicatorEvaluation Time

alocationLearning

sourceTechniq Instrument Examples

3.1 Discraibing the electric charge to understand the fenomena of the static electric and its relation to the daily life.

- The electric charge;

- The type of electric charge;

- The nature of electric charge;

- Electroscope;- Coulomb law;- Electric Potential.

- Laboratory Experiment obaut electric charge

- Laboratory Experiment obaut electroscope

- Discuss about electron theory;

- Mantion the example of the way to charge the body;

- Mantion type of electric charge;

- Mantion the nature of electric charge;

- Explain the function of the electroscope;

- Explain the coulomb law;

- Explain the electric potential.

- Paper and pencil test;

- Performance test

- Multiple choice

- Rubric evaluation.

A substance positive electric charged if . . . .a. has more

electrons b. less electronsc. less protonsd. the number of

protons equal to the number of electrons

3 meeting - BSE (2008)

- Ilmu Pengetahuan Alam untuk SMP Kelas IX; (Pusat Perbukuan Depdiknas 2008)

- IPA Fisika Bilingual (Yrama Widya. 2008).

BAB I

A. Basic Competence

3.1 Discraibing the electric charge to understand the fenomena of the static electric and its

relation to the daily life.

B. Indicator- Mantion the example of the way to charge the body;- Mantion type of electric charge;- Mantion the nature of electric charge; - Explain the function of the eelctroscope;- Explain the coulomb law;- Explain the electric potential.

C. Topic/Matrials

Dalam ilmu fisika, listrik dibedakan menjadi dua macam, yaitu listrik statis dan listrik dinamis. Listrik statis mempelajari sifat kelistrikan suatu benda tanpa memperhatikan gerakan atau aliran muatan listrik.Dalam ilmu fisika disebut elektrostatika. Sebaliknya, jika memperhatikan adanya muatan listrik yang bergerak atau mengalir, maka disebut elektrodinamika.

STATIC ELECTRIC

NATURE OF ELECTRIC ELECTRIC CHARGE COULOMB LAW

ITS TYPE

Electro-static

Electro dinamic

Postive electric charge

Negative electric charge

F=k . Q 1 .Q 2r 2

ATOM THEORY

ITS FLOWS

ATOMIC CONCEPT

In physics the term of electric is classified in two types, that are static electric and dynamic electric. The static electric learns about the nature of body electricity without mention the electric charge motion or its flows. In physics it called the electrostatic. Inversly if is mentioned to its motion or flows it called electrodynamic.Benda-benda yang telah digosok dan dapat menarik benda kecil yang ada di sekitarnya ini disebut benda yang telah bermuatan listrik. Dari kegiatan di atas yang telah kalian lakukan dapat disimpulkan bahwa:

1. Plastik yang telah digosokkan pada rambut kering akan bermuatan listrik negatif.2. Kaca yang telah digosok dengan bulu akan bermuatan listrik positif.

Objects which have been rubbed and it pull the small object exist around it is called an electric charged object.Jenis muatan listrik:

- Muatan listrik jenis positif;- Muatan listrik jenis negatif;

Sifat muatan listrik:Dua buah benda yang bermuatan listrik sejenis akan tolak-menolak dan jika muatan listriknya berbeda akan tarik-menarik.

Type of electric charge:- Positive electric charge- Negative electric chargeThe nature of electric charge are, between the same electric charge type will repulls refuse to refuse, to its other

To give electric charge to an object, it can be done by 2 ways, i. e: friction, and induction.a. Charging by friction:

When a plastic rule rubbing on a wool, there is a net transfer of electrons from the wool to the riler, so the ruler will exceed its electrons and the wool will lack of electron. The ruler will be negatively charged and teh wool will be positively charged. The example of object that is electric charged by friction, it can be seen on the table.

Explanation Type of object chargeRubbing a plastic with a wool Plastic (−) Wool (+)Rubbing a comb with hair Comb (−) Hair (+)Rubbing ebonite with a wool Ebonite (−) Wool (+)Rubbing a glass with a silk Glass (+) Silk (−)

Electric charge that is same will be repulsive and un-like charge will be attractive.

b. Charging by inductionInduction is a rearrangement of electric charges on a conductor because it is closed by a charge object. If negatively charged object is used to conduct a negatively charged object, the electric charge that is produced will be positive, conversely.

F=k . Q 1 .Q 2r 2

Electroscope There are two function of electroscope, i.e:1. To detect electric charge of substance2. To test the type of electric charge in an object.

Electroscope neutral

Generator Vn de GraffTo get high electric charge, we use Van de Graff generator. This tool works based on friction that causes electric induction.

The Coulomb’s LawThe unit of electric charge is coulomb (in SI).The force of attraction or repulsion between two charged bodies are direcctly proportional to the product of two charges and inversely proportional to the square of the distance between them.

Electric FieldElectric field is an area around of an electric charge that is influenced by electric force or coulomb force, or coulomb force. The direction of the field lines (as shown by the arrows) shows the direction of the force, as shown on the figure:

Atom’s Theory

Conductor and Insulator

Electric Potential

AB

e

DC

FE

In an object there are electricity which the same type, so that happened refuse, to its other.

- The potential of ball A is higher than ball B;- Electron flows from low to high potential;

- The potential of ball C is higher than ball D;

- The potential of ball F is higher than ball E;

The unit of electric potential is volt (V) in SI.

D. Formatif Test

1. When a plastic rod is charged negatively by friction,A. it gains electrons onlyB. it gains more electrons than protonsC. it loses protons onlyD. it loses more protons than electrons

2. M, N, O, and P are pith balls which behaves as follows;M repels N; M attracts O; O repels P.

If P is positively charged,A. N must be positively chargedB. N must be negatively chargedC. N must be positively charge or neutralD. N must be negatively charged or neutral

3. What will happen if a positive charge of static electricity is placed in an electric field?A. A force is produced on the charge.B. The charge will become negative.C. The charge will remain positive but become smaller.D. The charge will remain positive but become larger.

4. A positively charge pith ball attracts another suspended pith ball. Which of the following statements about the second pith ball is correct?

A. It must have fewer positive chargesB. It does not need to be chargeC. It must be negatively chargedD. It must be earthed

5. An ebonite rod is rubbed with fur and the rod becomes negatively charged because: . . . .A. the fur has some electrons to the rodB. the rod has gained some electrons from the furC. the fur has gained some proton the rodD. the rod has gained some protons to the fur

6. Why is a positively charged object made neutral (discharged) by someone touching it?A. Protons flow from the objectB. Electrons flow from the objectC. Protons flow onto the object

e

e

A B

D. Electrons flow onto the object

7. An electrically “earthed” or “ grounded” object is . . . .A. Buried undergroundB. Insulated from other electrical devicesC. Connected to zero potentialD. Touching the floor thrught an insulator

8. The two uncharged metal spheres, R and S shown in the figure below are separated while the negatively charged polythene strips is held near R. The resulting charges on R and S are : . . .

R SA. positive positiveB. negative negativeC. negative positiveD. positive negative

9. Consider the figure below! If A and B connected with conductor, so . . . . . A. VA > VB so the electrons flow from A to B 3 electrons.B. VA < VB so the electrons flow from A to B 3 electronsC. VA > VB so the electrons flow from B to A 6 electronsD. VA < VB so the electrons flow from B to A 6 electrons

10. Two objects with electrical charged each of them +2,5 coulomb and -4 coulomb separated between distance 2 cm. How much is the force between the two objects?

A. 4,5 x 1012 NB. 4,5 x 1011 NC. 2,25 x 1014 ND. 225 x 1014 N

E. Key Answer

1. B2. B3. A4. C5. B6. D7. A8. D9. B10. C

R S

BAB IIELECTRODYNAMIC

A. Electric current- Electric current is flow of electric charge from high potential to low potential, or from positive

pole to negative pole;- The direction of electric current is opposite with the direction of electron flow;- The electric current its cause by potential defference;- Electric current flow in an closed circuit.

B. Electric current (I)- Electric current is flow of electric charges in the circuit per one time unit (second);

- By the formula : I=Qt coulomb/second = ampere (A);

- The unit of electric current is ampere (A) in SI;1A = 103 mA (1 mA = 10-3 A) = 106 μA (1 μA = 10-6 A)

- The electric current its measured by using amperemeter and connected serially.

I= scale that showsby needlemaximum scale x measuelimit

C. Electric current source1. Direct Current source (DC)

- Volta’s element;- Battery (primary element);- Accumulator (secondary element);- Power supply;

2. Alternating Current source (AC)- Electric socket;

D. Voltage

1

5

0

- Voltage is sometimes called electric potential (V);- Voltage is the availabel energy to move electrons, it causes the electron freely to flow on a

conductor. The electrons will move if there is potential difference.

By the formula : V=WQ joule/coulomb = volt (V);

-

WORKSHOP PENYUSUNAN BAHAN AJAR BILINGUAL1. Kata pengantar2. Silabus3. BAB I

- Kompetensi Dasar- Indikator- Materi/Topik- Latihan- Kunci/penyelesaian

4. Daftar Rujukan5. BAB II

- Kompetensi Dasar- Indikator- Materi/Topik- Latihan- Kunci/penyelesaian

6. Daftar Rujukan