Lesson Note for Senior Secondary

Lesson Plan on Physics

Subject: Physics

Theme: Electrostatic

Topic: Electrostatic I

Sub Topic: Charge Distribution

Date: dd/mm/yyyy

Class: S.S.S 1

Duration: 30 Minutes

No of Learners: 30

Learning Objectives:

By the end of the lesson learners should be able to:
  1. Defined static electricity.

  2. Is an electrical charge that accumulates on an object when it is rubbed against another object.

    It can also be defined as an electric discharge resulting from the accumulation of electric charge on an insulated body.

  3. Describe charge distribution on a charged conductor.

  4. Examination of the distribution of charge over the surface of a conductor shows that the charges generally concentrate at places where the surface is sharply curved. Thus the surface charge density or charge per unit area is very high at sharp points with very small areas. It is also found that the charges reside only on the surface of a conductor and not inside.

Rationale:

Charge distribution is an important aspect in the understanding concentration of charges in different shapes and this helps us get to know the working principle of thunder arrestors.

Prerequisite/ Previous knowledge:

Types of laws, charges and charging methods.

Learning Materials:

Electroscope, pear-shaped sphere.

Reference Materials:

Senior Secondary Physics. By P. N. Okeke and M. W. Anyakoha

Lesson Development:

STAGE
TEACHER'S ACTIVITY
LEARNER'S ACTIVITY
LEARNING POINTS
INTRODUCTION
full class session (5mins)
Through question and answer teacher guides the learners to determine pre-requisite skills on type and laws of charges.
  • Law of charges: Things that have the same charge push each other away (they repel each other). This is called the Law of Charges. Things that have more electrons than protons are negatively charged, while things with fewer electrons than protons are positively charged. Things with the same charge repel each other.
  • Laws of charges:- Opposite charges attract each other. Like charges repel each other. Charged objects attract neutral objects.
  • Types of charges: There are two types of electric charge: positive and negative (commonly carried by protons and electrons respectively). Like charges repel each other and unlike charges attract each other. An object with an absence of net charge is referred to as neutral.
Learner’s entry points.
STEP 1
5mins.
Development
Teacher to provide learners with aluminium foil, razor blade, cotton blade and allow them to identify the items. Students identify the apparatus as aluminium foil, razor blade, cotton blade. Being able to identify the apparatus.
STEP 2
15mins.
Teacher guide learners to cut the aluminium foil into a pear shape, suspend it using cotton thread, rub ebonite rod with a piece of cloth, bring it near the sharp end of your pear-shaped foil the rounded part, note down the observation. Learners follow the teacher's directives. Being able to cut the aluminium foil into pear shape Test the strength of attraction on both ends.
STEP 3
Group Work (5mins)
Guide the Students to form four groups and ask them to choose their leaders and secretaries. Learners form four groups and choose their leaders and secretaries. Inculcating leadership skills, boldness, competitive spirit, teamwork, and a sense of responsibility among students.
STEP 4
5mins
Ask students to share their observations in groups. Students share their observation Collaboration among group members, manipulation of results and observing that the sharp point moves more.
EVALUATION
3mins
The teacher asks the students questions.
  1. From your observation what is static electricity?
  2. Explain charge distribution on a conductor
  1. An electrical charge, often created by friction, consisting of stationary ions that do not move in a current.
  2. Charges generally concentrate at places where the surface of a conductor is sharply curved.
Asking the learners questions to assess the achievement of the set objectives.
CONCLUSION
2mins
Teachers wrap up from the learners' observations. The students listen to the teacher and copy down notes. Consolidating and harmonizing scientific concepts.