Lesson Notes By Weeks and Term v4 - JHS 1
ELECTRICITY AND ELECTRONICS
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ELECTRICITY AND ELECTRONICS
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Science
Class: JHS 1
Term: 2nd Term
Week: 8
Grade code: B7.4.2.1.1
Strand code: 4
Sub-strand code: 2
Content standard code: B7.4.2.1
Indicator code: B7.4.2.1.1
Theme: FORCES AND ENERGY
Subtheme: ELECTRICITY AND ELECTRONICS
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Electricity is the energy we use every day for lighting, charging phones, running fans, watching TV, pumping water, and powering industries. In Ghana, electricity may come from different sources such as Akosombo (hydroelectric), Aboadze (thermal), and potentially nuclear in the future. Understanding the various forms of electricity helps learners explain where electrical power comes from, how it is produced, and why some sources are more suitable for certain communities and uses.
A. Meaning of Electricity Electricity is a form of energy associated with the presence and movement of electric charges (mainly electrons). When charges build up in one place → static electricity When charges flow through a conductor (like a wire) → current electricity
B. Forms of Electricity (Main Classification) In JHS Science, “forms of electricity” can be described in two connected ways: By how charges behave Static electricity Current electricity (AC and DC) By how electrical energy is generated (sources/forms of generation) Hydroelectricity Thermal electricity Solar electricity Wind electricity Nuclear electricity (Others exist like biomass and tidal, but we focus on the common ones in Ghana and the exemplar: thermal and nuclear.)
Both classifications help learners “describe various forms of electricity” clearly.
C. Static Electricity Static electricity is the build-up of electric charges on the surface of an object. The charges do not flow continuously; they stay “static” until discharged. How static electricity happens (simple explanation) When two materials rub together, electrons can move from one material to the other. One object becomes negatively charged (gains electrons). The other becomes positively charged (loses electrons). Ghanaian examples Rubbing a balloon on hair and it sticks to a wall. Clothes sticking together after drying (especially synthetic materials). Small shocks when touching a metal door handle after walking on a carpet. Lightning is a large-scale static electricity discharge in the atmosphere.