Lesson Plan (Electricity Bell)

7/31/2019 Lesson Plan (Electricity Bell)

1/9

Review Content and Curriculum of Physic I

Yolanita Septiana Page 1

LESSON PLAN

School Unit : Junior High School

Subject : Physical ScienceChapter : ElectricitySub Chapter : Static Electricity

Class/semester : IX/1st

Time Allocation : 2 x 45 minutes

I. Standard CompetenceUnderstand the concept of electricity and its application in everyday life

II.Basic CompetenceDescribe the electrical charge to understand the phenomena of static electricity as

well as in relation to everyday life

III.Indicator1. Describes the object can be electrically charged when it's done in a certain way2. Give examples of events that produces electrically charged objects.

IV.Learning Experience1.

Differentiating a positive electrical charge and a negative electrical charge.2. Differentiating atom model Dalton, Thomson, and Rutherford.3. Differentiating protons, electrons, and neutrons.4. Explain the charge of an object.

V. Model, Approach, and Learning Method Model : Cooperative Learning

Type : Example and Non Example

STAD (Student Team Achievement Divisions)

Method : Explanation and disscusionVI.Sources

1. Student Book2. Worksheet


2/9



VII.Teaching and Learning ActivityTeacher Activities Student Activities Time

Introduction Activities

1. Teacher opened a lesson2. Teachers motivate students by telling

the daily events related to the

material

3. The teacher asked the students'understanding of the material that

will be discussed

4. Teachers submit learning objectives

1. Student Listening2. Student listening a explanation

of teacher with carefully.

3. The student submit aunderstanding owned by the

material.

10

minute

Main activities

1. Teacher introduction Phet (PhysicEducation Technology) and the uses

in daily life.

2. Teacher guide a students todemonstrated which one application

of static electricity.

3. Teacher explain relationship betweendemonstrated with material.

4. Teacher explain subject matter ingeneral.

5. Teacher guide the student to forminga group that member four with

heterogen ( suitable of divided by

teacher) as group discuss.

6.

Teacher give a discuss task to agroup to doing that with a other

member.

7. Teacher show a picture aboutmaterial and like a simulations of

ballons and woll on java script and

teacher give a worksheet group like

a subject there are :

Topic will be discuss :

1. Student listening and can askthe question if the matter notclear.

2. The one member haveunderstood about the

matterial can explaind to other

till whole of members can

understand as same.

3. The whole of members in thegroup presented the each of

material.

70

minute


3/9



1. Explain about the reationshipbetween ballons and clothes woll.

2. Analyze charge on the ballons3. Analyze charge on the clothes wall4. Analyze the direct of positif charge

and negative charge.

5. Application of static electricity ondaily activity.

6. Teacher will be add information ifthe student not understand and

explain that material.

8. When do worksheet, teacher guidestudent to do it.

9. Some group are make apresentation in front of class based

on their discussions result and the

other group will respond it.

Closing activities

1. Teachers give awards to groups thathave the performance and good

result.

2. Student (guided by the teacher) tomake a summary discussion.

3. Teachers give homework in the formof exercises.

4. Teacher give a information to astudent for a next meeting.

Student take the sumarries material 10

minute


4/9



VIII. ASSESSMENT

1. Techniques : Written test2. Instrument : EssayScoring rubric of Activity

No Students

Names

Aspects Total

ScoreProceDure

ChoosingToolsand

materials

Result Report Cleanliness Teamwork

1.

2.

3.

4.


5/9



1. Draw the required fields and charge distributions asked for below:

a. Electric field around two positive charge

b. Electric field between two parallel charged plates

c. Positively charged sphere and negatively charged rod.

ELECTROSTATICS WORKSHEET


6/9



2. Answer all of the following questions:

Explain in words what you understand the term electric field to mean and give amathematical definition of the strength of such a field.

________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

On an electrostatic surface, such as the surface of a Van de Graaff generator, nowork is needed to move charge from one point to another on the surface. What

does this tell you about the potential difference between points on such a surface?

________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________


7/9



STATIC ELECTRICITY

A.Electric ChargeThere are two kinds of charges, i.e positive and negative charges. Like charges will

repel each other, whereas unlike charges will atract each other.

Figure 1

Like charges will repel each other,Unlike charges will attract each other

Electric charge is a basic character possessed by the particles which compose the

atom. Generally, atom consists of electrons and atomic nuclei. Atomic nucleiconsist of

protons and neutrons. Electron has negative charge, proton has positive charge, but

neutron does not have electric charge.

Tabel 1

Mass and Charge of the particle

Particle Mass Charge

Electron 9.11 x 10-31

kg -1.6 x 10-19

C (-e)

Proton 1.672 x 10-27

kg +1.6x 10-19

C (+e)

Neutron 1.674 x 10- 7

kg 0

In physics, power is divided into two types, namely static and dynamic power. Static

electricity studying the electrical properties of an object without regard to the

movement or flow of electric charge. In the science of physics is called electrostatics.

Conversely, if you pay attention to the existence of electric charge moving or flowing,

then it is called dynamic electricity or electrodynamics. Thales of Milete (540 -546 BC)

was an ancient Greek thinkers, who according to history that the phenomenon of static

electricity occurs in amber is rubbed with fur.

Turns amber could attract light objects such as chicken feathers others. In Greek

amber is often called the electron. To explain the meaning of the electrical properties on

an object, it is necessary to understand the concept of atoms generated by the experts in

between, the atomic theory of Dalton, Thompson, Rutherford and Bohr. Generally it can

+ +

+ +


8/9



be explained that:

1. Objects composed of similar atoms.2. Each atom consists of a core surrounded by one or more electrons.3. The positively charged atomic nucleus, electrons are negatively charged.4. The nucleus consists of positively charged protons and neutrons that are notelectrically charged.

Figure 1

a) Atom Thomson model, b) model Rutherford atom, c) atom nuclei model

Objects or materials generally have a number of protons equals the number of

objects called electrons in neutral. If the balance between the number of protons and

electrons are disturbed that the amount of reduction or increase in the charge of

electrons, the object is said to be electrically charged. Objects will be electrically charged

electrons and positively when shortcomings negatively charged objects in an excess of

electrons.

a neutral atom has an equal amount of electrons and protons. In a positively

charged atom, the number of proton exceeds that of electron. On the contrary, in a

negatively charged atom,the number of protons is less than that of electron.

In inter-atomic interaction, the particle that tends to move from one body to other

is electron. A neutral atom will be negatively charged if it obtains additional electrons

(its electrons move to other ato or body). Electric charge is conserved, can be neither

created not destroyed.

A neutral body could be charged. The process of charging could be carried out in

three ways,i.e by :

1. Rubbing (the electricity produced is called triboelectric),2. Conduction ( connecting to another charged body ), and3. Induction ( bringing close to another charged body


9/9



The first prodecure above is the procedure that we have used on the

observation of the electrostatic effect in the beginning of this chapter. A plastic

ruler that was initially neutral finally had charged after it was having been

rubebed by tissue paper. As the result, the ruler was able to attract small pieces

of paper.

Documents

Lesson Plan (Electricity Bell)