Physics coursework - Mr. C - JCS

Physics coursework - Mr. C - JCS

Physics coursework Title 2017 Using conductors made of childrens play (modelling) dough, investigate quantitatively the effect on resistance, calculated from measurements of voltage across and current through the conductors, of changing the conductor length and obtain data to establish whether dough colour has an effect on its resistance. Part 1 (Introduction) (i) Statement or problem to be investigated What

you are going to do in your own words (ii) Background research undertaken You will have to look up a few websites and books to find information for your investigation. You may even have to ask your teacher or someone at

home for information. This is your background research you will need to give at least 2 pieces .Refer to questions sheet Internet (Give full link!) Books (Author and Publisher

Page and Details) Background on project It turns out that play dough conducts electricity Play dough is made of flour, water, salt and borax( this stops the play dough developing mould),dye. 6 Part 2 (Preparation and Planning) (5 needed)

i) Variables1. The Independent Variable (what I will change - 1 thing)* ( Part 1:playdough length Part2:playdough colour 2. The Dependent Variable (what I will measure - 1 thing)* Resistance

3. The controlled Variable (what i will keep the same - as many as you can!) Eg : Use Same multimeter each time Same room temperature Same uniform cross section of playdough Same

brand of play dough Equipment: Be sure to list every piece of equipment you use, leave nothing out! Tasks: This is the list of jobs that need to be done in order. (Like a todo list) Use bullet points 4 points needed Eg :

Measure out the lengths of our play dough Record and analyse results Part 3 (Procedures, apparatus etc.) (i) Safety (You need at least two safety precautions) These must be specific to this project not general lab rules such as bags outside lab. Eg set up circuit away from water

Disconnect the circuit after each measurement to prevent it from getting hot. (ii + iii) Procedure with diagram - The best advice I can give is to write it like a recipe if a person cannot copy the experiment using what you have written its no good and you need to do it again You could divide experiment into 2 sections Part 1: Changing play dough length Part 2: Changing play dough colour Number your steps. There must be 7 steps at least Label all parts in your diagram (iv) Data and observations

Decide what results you are going to take and when you are going to take them before the experiment. Make up a data table before you start your experiment so you can record your measurements as soon as you observe them. This will ensure that you are consistent in the way that you record your results and it will also make it easier to analyse Measurements should be clearly laid out in a graph and/or table form. Was there anything else you noticed when doing the experiment whatever it is no matter how small, include it.

Other observations to note include Did you encounter any problems with the experimental method? Did you notice any interesting patterns happening? Sample Table : Results part 1 : Changing play dough length Play Curren Dough t Length cm T1 Amps Voltag e

T1 Volts Resist ance T1 Ohms Curren t Voltag e T2 Amps T2

Volts Resist ance T2 Ohms Curren t Voltag e T3 Amps T3 Volts

Resist ance T3 Ohms Averag e Resist ance Ohms Sample graph Part 1 Changing Dough length Or Resistance can be calculated by reading values from a voltage vs current graph

Sample table 2 Results: Changing Dough colour Dough Colour Curren Voltag t e T1 Amps T1 Volts Resist ance T1 Ohms

Curren Voltag t e T2 Amps T2 Volts Resist ance T3 Ohms Curren Voltag t e

T3 Amps T3 Volts Resist ance T3 Ohms Averag eResis tance Ohms Sample bar chart for graphing results in Part 2 Changing Dough colour

Play dough colour Part 4 (Analysis) THIS IS A VERY IMPORTANT SECTION (i) Calculations and Data Analysis Make sure you outline any calculations or formulae that you used. Eg : formula for calculating resistance

How did you find average values? Did you round off any numbers ? Some useful sentence starters in this section are: I can see from my results that .. When I changed .., .. changed by.. From the graph I can see that . (ii) Conclusion and Evaluation of results. Answer some of the following questions in your written report.

Do your results answer the question you were asking at the start? When you changed the play dough length/colour did it affect the resistance? Were the results what you were expecting? Is there a trend in your results or did anything unusual happen ?Can you explain it if so ?

If you drew a graph did you get a straight line or a curve what does this show? Resistance should be greater in small thick pieces of play doh than longer thinner pieces of play doh The resistance of play doh increases with increased length once other factors that affect resistance are kept constant such as temperature, diameter of play doh etc. Resistance seems to vary between different colours of play dough .This may be due to the chemicals that are added to the play doh to create the different dyes. If your results did not show this trend can you explain why ?

Part 5 (comments) (i) Refinements, extensions and sources of error Were you surprised by these results? Was there anything that might have affected your results? Eg: multimeter readings fluctuating loose connections in wires,cracks in play doh, play doh dried out. Are there any changes you would make if you could do the experiment again? Is there any way of making it more accurate?

Does your investigation have any real life applications? Could you develop your experiment further, how?

Recently Viewed Presentations

  • APHG GEOGRAPHERS AL-IDRISI By: Kayla Mobley BIOGRAPHY Al-Idrisi

    APHG GEOGRAPHERS AL-IDRISI By: Kayla Mobley BIOGRAPHY Al-Idrisi

    He also used old maps drawn by other Muslim geographers and the Greek geographer Ptolemy. The result was a silver planisphere that showed major cities, lakes and rivers, mountains and trade routes. He also wrote a book named "Kita Rujar"...
  • Organikus és szimptómás mentális- és viselkedészavarok (F00-F09)

    Organikus és szimptómás mentális- és viselkedészavarok (F00-F09)

    (a feladat befejezése után nem ellenőrzi le a megoldást) csökken az önkorrekció (az észlelt hiba nem érdekli, nem javítja ki) csökken . az általános produktivitás szintje: a válaszadás meglassul bármely tesztben és csökken a válasz mennyisége (jó tempóban hozzákezd, de...
  • File Permissions - cise.ufl.edu

    File Permissions - cise.ufl.edu

    An Access Control List (ACL) for a resource (e.g., a file or folder) is a sorted list of zero or more Access Control Entries (ACEs) An ACE refers specifies that a certain set of accesses (e.g., read, execute and write)...
  • dAILY life in afghanistan..

    dAILY life in afghanistan..

    They are not supposed to wear casual clothes (jeans, t-shirts) because it is "too western" for their culture. Food in Afghanistan. QabliPulao: Most popular, steamed rice with chopped raisins or carrots. Served with Lamb or Lamb Kabobs. ... dAILY life...
  • 03/01/20 Heating and Cooling W Richards Worthing High

    03/01/20 Heating and Cooling W Richards Worthing High

    The sparkler is at a higher temperature than the bath, but the bath is MUCH heavier, so it has more heat energy. Particle theory is all about explaining the properties of solids, liquids and gases by looking at what the...
  • GLAS Training for Advisors - Agriculture

    GLAS Training for Advisors - Agriculture

    Yellow Card - The Trainer will have to re-examine his/her training plan and amend as appropriate to fulfil GLAS training requirements. The Trainer will be inspected a 2nd time. If upon 2nd inspection training is still considered inadequate - Red...
  • Perspectives on Culture - Novella

    Perspectives on Culture - Novella

    Arial Wingdings Times New Roman Capsules Microsoft PowerPoint Presentation Culture and Culture Learning Process Defining Culture Culture in Everyday Use Subculture Microculture Ethnic Group Minority Group People of Color Culture Solves Common Human Problems The Contributions of Cross-Cultural Psychology Culture...
  • Information literacy - University of Massachusetts Lowell

    Information literacy - University of Massachusetts Lowell

    The UML Library System. Other tutorials review online resources such as government and popular websites. One great online resource you have is the UML Library website. Using the library website, you can access enough material to write a complete review...