Edexcel AS Physics Student Unit Guide: Unit 2 Physics at Work

Summary:
Student Unit Guides are perfect for revision. Each guide is written by an examiner and explains the unit requirements, summarises the relevant unit content and includes a series of specimen questions and answers.

There are three sections to each guide:

Introduction - includes advice on how to use the guide, an explanation of the skills being tested by the assessment objectives, an outline of the unit or module and, depending on the unit, suggestions for how to revise effectively and prepare for the examination questions.

Content Guidance - provides an examiner's overview of the module's key terms and concepts and identifies opportunities to exhibit the skills required by the unit. It is designed to help students to structure their revision and make them aware of the concepts they need to understand the exam and how they might analyse and evaluate topics.

Question and Answers - sample questions and with graded answers which have been carefully written to reflect the style of the unit. All responses are accompanied by commentaries which highlight their respective strengths and weaknesses, giving students an insight into the mind of the examiner.

• A revision guide specifically written to meet the requirements of the unit
  

• Written by an examiner with commentary on key points and concepts 
  

• Features specimen questions and answers, together with examiner's comments
  

Table of Contents:
Introduction
About this guide
The specification
The unit test
Revision
Content Guidance
About this section
Waves
Wave terminology
Longitudinal and transverse waves
Electromagnetic waves
Superposition and interference
Standing waves
Refraction
Plane polarisation
Diffraction
Reflection
Doppler effect
DC electricity
Series circuits
Parallel circuits
Electrical energy and power
Ohm’s law
Resistivity
Potential dividers
Electromotive force
Factors affecting current flow in conductors
Nature of light
Planck’s equation
The electronvolt
Photoelectric effect
Atomic spectra
Intensity of light
Wave–particle duality
Questions and Answers
About this section
Test paper 1
Test paper 2

About the Author(s):
Mike Benn has been an examiner for over 25 years.