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#### Refraction - Questions and Worked Solutions

These questions are written as exam-style questions and can be completed by students in class or at home. The time allocated is 30 minutes.
Full working solutions are included in the download.
Learning Objectives Covered in these questions:
1. Describe the reflection and transmission of waves at a boundary between two media;
2. Draw wavefront and ray diagrams to illustrate refraction between media of different optical density;
3. Describe an experiment that can verify Snell’s Law and measure the refractive index;
4. State and apply Snell’s Law.

#### Refraction Experiment - Snells' Law and Refractive Index

This experiment will verify Snell’s Law and to determine the refractive index of a perspex prism.
It should take 60 minutes to collate data, complete data analysis, conclude and evaluate. Clear direction is given throughout and sample data is included in the download.
Learning Objectives Covered in this experiment:
1. Describe an experiment that can verify Snell’s Law and measure the refractive index;
2. State and apply Snell’s Law.

#### Investigating Energy in Capacitors - Practical Worksheet and Sample Data

Aim:
To investigate how the voltage across a a capacitor affects the energy stored in the capacitor.
The following learning objectives are met in this experiment:
- Calculate the energy stored in a capacitor from a charge-voltage graph;
- Select and use the energy equations for a capacitor.
Download Includes:
Practical Worksheet AND Sample data and analysis

#### AQA Measurements and Their Errors - Question Bank and Solutions

Relates to AQA Topic 1: Measurements and Their Errors
Questions cover the whole of this topic and full worked solutions are included.
Learning Objectives:
A working knowledge of the specified fundamental (base) units of measurement is vital. Likewise, practical work in the subject needs to be underpinned by an awareness of the nature of measurement errors and of their numerical treatment. The ability to carry through reasonable estimations is a skill that is required throughout the course and beyond.
Download Includes:
Question bank and full worked solutions

#### AQA - Measurements and their Errors - Topic Test and Markscheme

AQA Topic 1: Measurements and their Errors – Topic Test
Learning Objectives:
A working knowledge of the specified fundamental (base) units of measurement is vital. Likewise, practical work in the subject needs to be underpinned by an awareness of the nature of measurement errors and of their numerical treatment. The ability to carry through reasonable estimations is a skill that is required throughout the course and beyond.
Download Includes:
Topic Test and Marking Scheme

#### Capacitors - Questions and Worked Solutions

The following learning objectives are met in this set of questions:
- Define Capacitance and the Farad;
- Select and use Q=CV;
- Describe the construction of a capacitor and understand that a dielectric between the plates will increase the capacitance;
- Use C = Epsilon0*A/d for a parallel plate capacitor, with no dielectric;
- State and use the equations for capacitors connected in series and parallel;
- Describe the uses of a capacitor for the storage of energy in applications such as flash photography and back-up power supplies.
Download Includes:
Student worksheet AND Worked Solutions

#### Capacitor Discharge - Questions and Worked Solutions

The following learning objectives are met in this set of questions:
- Sketch graphs to show the variation with time of potential difference, charge and current for a capacitor discharging through a resistor;
- Define the time constant of a circuit and use Time Constant = CR;
- Explain the exponential decay function as having a constant ratio property;
- Analyse the discharge of a capacitor using exponential decay equations;
Download Includes:
Student Worksheet AND worked solutions

#### Capacitor Discharge - Powerpoint Presentation

The following learning objectives are met in this powerpoint presentation:
- Sketch graphs to show the variation with time of potential difference, charge and current for a capacitor discharging through a resistor;
- Define the time constant of a circuit and use Time Constant = CR;
- Explain the exponential decay function as having a constant ratio property;
- Analyse the discharge of a capacitor using exponential decay equations;
Perform and describe an experiment to determine the time constant for R-C circuits.

#### Refraction - Disappearing and Reappearing Coin

A student worksheet and answers are included in the download.
This demonstration introduces refraction through the bending of light rays through water. The coin will appear to disappear in the first demonstration, and reappear in the second demonstration.
It should take 15 minutes.
Instructions
1. Students should be given a paper copy of the accompanying questions to the demonstration.
2. Talk through the answers to the questions as the demonstration progresses.
Learning Objectives Covered in this starter demonstration:
1. Describe the reflection and transmission of waves at a boundary between two media;
2. Draw wavefront and ray diagrams to illustrate refraction between media of different optical density.

#### Energy in Capacitors - Questions and Worked Solutions

The following learning objectives are met in this set of questions:
- Explain how energy is stored within a capacitor;
- Calculate the energy stored in a capacitor from a charge-voltage graph;
- Select and use the energy equations for a capacitor.
Download Includes:
Student worksheet AND worked solutions.

#### WJEC Eduqas A Level Physics (from 2015) - complete scheme of work incl. 288 resources

Work Less. Teach Smart.
We all talk about not re-inventing the wheel. BUT we LIKE making our own resources - right?
Picture the scene…
QUESTION: It’s 6pm Wednesday night and you have plans at 7pm with friends/kids. Is it worth re-inventing the wheel at this stage? Is it worth writing a bespoke resource for you class tomorrow? Are they REALLY going to get the extra value from that resource that you have slaved over?
**ANSWER: **It’s NOT WORTH IT.
There are times when you are going to need to prioritise other stuff over lesson planning. You need something reliable and fast. This is the time you use your Guzled WJEC Eduqas A-Level scheme of work. You will have 280+ resources that you can simply download and use. No thinking. Just work less. Teach smart.
Are you teaching the WJEC Eduqas A Level Physics specification? This download includes 288 resources covering the breadth of the whole course.
Mapped exactly to the WJEC Eduqas specification, you’ll find the following types of resources covering most learning objectives:
Lesson plans
Powerpoints
Question sheets and solutions
Practicals (and sample write-ups)
Starter activities
Resources are provided in pdf format with instructions on how to convert to Word and allow editing.
Testimonials
"Keep up the good work - you are providing an excellent service" (Chris Beason, St. Thomas More Catholic School)
"I think Guzled is by far the best A-Level Physics resource out there, and would always be happy to recommend it to anyone. I have a few young members of staff who are new to teaching A-Level, and it is hard to out into words how easy and pain-free you have made their lives (and by extension mine!)." David Rowley, The Duchess Community High School
"Guzled is a fantastic resource providing an excellent resource based for the breadth of the A-Level WJEC course. We have found the resources extremely useful in guiding our teaching of the key topics and the supplementary questions and answers are an excellent and efficient way of assessing the understanding of students. We have found Guzled to be extremely good value for money given the use we have made of the resources" (Ian Hanley, Whitgift School)

#### Capacitor Discharge - Starter Demonstration, Student Worksheet and Answers

This starter demonstration will highlight the relationship between the value of the resistor and the capacitor on the discharge rate. Students will see the voltmeter drop quickly to begin with and then tail off. The time constant will be introduced.
The following learning objectives are met in this starter demonstration:
- Sketch graphs to show the variation with time of potential difference, charge and current for a capacitor discharging through a resistor;
- Define the time constant of a circuit and use Time Constant = CR;
Download Includes:
Teacher Instructions, Student worksheet AND answers

#### Capacitors - Starter Demonstration - Bin Bag Capacitor

This demonstration will introduce how a capacitor is constructed. It will also introduce the distribution of charge on a capacitor as it charges and discharges. At the end of the demonstration, it will be possible to observe the breakdown of the dielectric material within a capacitor.
The following learning objectives are met in this starter demonstration:
- Describe the construction of a capacitor and understand that a dielectric between the plates will increase the capacitance.
Download Includes:
Teacher Instructions, Student worksheet AND full answers

#### Energy in Capacitors - Starter Questions and Answers

The following learning objectives are met in this set of starter questions:
- Explain how energy is stored within a capacitor;
- Select and use the energy equations for a capacitor.
Download Includes:
Student worksheet AND Answers

#### Investigating Capacitor Discharge - Practical Worksheet and Sample Data

Aim:
To investigate how the voltage varies with time across a discharging capacitor.
The following learning objectives are met in this experiment:
- Sketch graphs to show the variation with time of potential difference, charge and current for a capacitor discharging through a resistor;
- Define the time constant of a circuit and use Time Constant = CR;
- Explain the exponential decay function as having a constant ratio property;
- Perform and describe an experiment to determine the time constant for R-C circuits.
Download Includes:
Practical Worksheet AND Sample data and analysis

#### Energy in Capacitors - Powerpoint Presentation

The following learning objectives are met in this powerpoint presentation:
- Explain how energy is stored within a capacitor;
- Calculate the energy stored in a capacitor from a charge-voltage graph;
- Select and use the energy equations for a capacitor.

#### Investigating Capacitors in Series - Practical Worksheet and Sample Data

Aim:
Investigate the effect of connecting capacitors in series on the voltage across a discharging capacitor.
Learning objectives met in this experiment:
- State and use the equations for capacitors connected in series and parallel;
Download Includes:
Practical Worksheet AND Sample data and analysis

#### CCEA Electricity - Topic Test and Marking Scheme

CCEA Unit 1.9 – 1.12: Electricity – Topic Test
Learning Objectives:
- Introduces the ideas of charge and current.
- Knowledge and understanding of electrical symbols, electromotive force, potential difference, resistivity and power are key in this topic.
- An understanding of electrical circuits, internal resistance and potential dividers.
- LDRs and thermistors are used to show how changes in light intensity and temperature respectively can be monitored using potential dividers.
Download Includes:
Topic Test and Marking Scheme

#### CIE Electricity - Topic Test and Marking Scheme

CIE Electricity – Topic Test
Includes:
Topic 19 – Current of Electricity
Topic 20 – D.C Circuits
Learning Objectives:
- Introduces the ideas of charge and current.
- Knowledge and understanding of electrical symbols, electromotive force, potential difference, resistivity and power are key in this topic.
- An understanding of electrical circuits, internal resistance and potential dividers.
- LDRs and thermistors are used to show how changes in light intensity and temperature respectively can be monitored using potential dividers.
Download Includes:
Topic Test and Marking Scheme

#### Capacitors - Powerpoint Presentation

The following learning objectives are met in this powerpoint presentation:
- Define Capacitance and the Farad;
- Select and use Q=CV;
- Describe the construction of a capacitor and understand that a dielectric between the plates will increase the capacitance;
- Use C = Epsilon0*A/d for a parallel plate capacitor, with no dielectric;
- State and use the equations for capacitors connected in series and parallel;
- Describe the uses of a capacitor for the storage of energy in applications such as flash photography and back-up power supplies.