Lesson Notes By Weeks and Term v4 - SHS 2
ELECTROSTATICS
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
ELECTROSTATICS
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Physics
Class: SHS 2
Term: 2nd Term
Week: 3
Grade code: 2.3.1.LI.3
Strand code: 3
Sub-strand code: 1
Content standard code: 2.3.1.CS.2
Indicator code: 2.3.1.LI.3
Theme: ELECTRIC FIELD, MAGNETIC FIELD AND ELECTRONICS
Subtheme: ELECTROSTATICS
This page supports the lesson note with a companion video and a short classroom-ready summary.
For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.
Good day, students! Today, we are going to explore a very important component in almost every electronic device you use: the capacitor. Think about your mobile phone, the radio in your home, your television, or even the powerful flash on a camera. All these devices rely on capacitors to function correctly. A capacitor is essentially a tiny device that stores electrical energy, much like how a bucket stores water or how the Akosombo Dam stores water to generate electricity. Understanding how they work is fundamental to understanding electronics.
A. What is a Capacitor?
A capacitor is an electronic component that stores electric charge. It consists of two or more conductive plates separated by an insulating material called a dielectric. Analogy: Imagine a water tank (like a Polytank). Its *capacity* is how much water it can hold. A capacitor's capacitance is its ability to store electric charge. B. Capacitance (C)
Capacitance is defined as the ratio of the magnitude of the charge (Q) on either conductor to the magnitude of the potential difference (V) between them.
``` Capacitance (C) = Charge (Q) / Potential Difference (V) C = Q / V ``` Charge (Q): Measured in Coulombs (C). Potential Difference (V): Measured in Volts (V). Capacitance (C): The S.I. unit is the Farad (F), named after Michael Faraday.