Capacitance and Capacitor

Capacitor is the focal point of this module. In this module, a pair of parallel-plates is used to model this electric element, and its capacitance is defined. The various shapes and types (e.g. dielectric) of capacitors are discussed following the same principles found in a parallel-plate capacitor. The energy storing ability of the capacitor is examined as well, and a discussion on how to deal with multiple capacitors in an electric circuit rounds up the materials covered in this module.

Introduction

This module opens up a gate way for students to connect somewhat abstract physics of charge, electric field and electric potential with a real-life circuit element that is tangible and has a physical presence. This presents an opportunity for students to gain better understanding and appreciation for fundamental physics. Introducing measurement instruments and laboratory exercise at this point would be very beneficial in the learning process. The multiple choice questions throughout this module give students valuable feedback as they progress through each unit.

This module consists of a sequence of 8 videos with 2 step-by-step solved examples and 6 self-assessment questions. It is expected that the course instructor, will supplement the module with additional questions and possibly one laboratory exercise.

Prerequisites

Before starting this module, it will be helpful to be familiar with:

• Dot product of two vectors,
• Electric charge and electric field,
• Definition of electric potential,
• Material properties of an insulator.