GCSE Physics - 11.5 Thurday 29-04-2015 Last lesson! Classwork We had our last lesson. Well done for solving the puzzle. Homework Revise for your exams! Enjoy the summer. Tuesday 28-04-2015 More Past Papers Classwork I gave out some Paper 2 papers and markschemes - these are not on the website. You should have January 2014 and June 2014. Some of the questions may have been used in your mock. You worked on these papers and I explained some stuff about the motor effect and the generator effect. Homework Continue your revision. Monday 27-04-2015 More Past Papers Classwork I gave out this paper (with Q2 removed). Note: I should also have removed Q8 as this is not really on our syllabus either. Homework Continue your revision. Thursday 23-04-2015 Past Paper Practice Classwork I gave you feedback on common errors on the paper you did last lesson, and gave out the markscheme. We talked about proportionality and inverse proportionality and how to test whether two variables are proportional or inveresly proportional. Homework Do this paper (with Q4 taken out). If you would like me to mark it before next lesson, then you will have to hand it in on Friday morning - I won't have any time on Monday morning before our lesson. Tuesday 21-04-2015 Past paper questions Classwork We started these past paper questions. Homework Finish the questions we started in class and hand them in before reg on Thursday. If you don't hand them in before this deadline then I won't be able to mark them for the lesson. Tuesday 24-03-2015 Circuits Questions Classwork You did some questions on circuits on P174. Homework Check the answers to the questions you did using the answers linked to above. Do some revision. Have a good Easter. Thursday 19-03-2015 Lenses & the eye Classwork We made notes on the factors that affect the focal length of a lens. We made notes on laser eye surgery. Tuesday 17-03-2015 The eye Classwork We looked at how the eye works, and I demonstrated long and short sight and their correction with a model eye. Homework Mark your answers to the questions done in the cover lesson using these answers. Bring your marked work and any questions you have to next lesson. Monday 16-03-2015 The lens formula Classwork We made notes on the lens formula and did several examples. We made notes on diverging lenses, did a few ray diagrams, and did a lens formula calculation for a diverging lens. We defined magnification. Homework Answer Q1-3 on P113. Hand in tomorrow morning before registration. Thurday 12-03-2015 Lens ray diagrams Classwork We did ray diagrams and experiments for: u > 2f u = 2f 2f > u > f u < f Tuesday 10-03-2015 Lenses and images Classwork We watched the video from the HW (as the link didn't work). We formed an image on a screen using a converging lens. We made notes on the features of images (magnified/diminished, upright/inverted, real/virtual). Homework Watch the first half of this video (up to when the object is at f) and make notes, using P110 to help you. Bring your notes to next lesson. Monday 09-03-2015 Cover Lesson Classwork Read and make notes on P114-5. Answer the questions on P115. Read and make notes on P116-7. Answer Q1-2 on P117. Homework Watch the first six minutes of this video about how lenses work and make notes on the key terms, using P108-9 to help you. Bring your notes to next lesson. Friday 06-03-2015 Optional: Physics Olympiad THIS IS NOW POSTPONED UNTIL NEXT WEEK :( If you want to do it, practise some papers here. Thursday 05-03-2015 Lenses Classwork We went through the HW. We discussed optical fibres and fibre bundles. We did this task and then checked our result with a ray box and a semicircular block. We formed an image on a peice of paper with a magnifying glass - more on this next week. Tuesday 03-03-2015 TIR Calculations Classwork We went throug the HW. We did Q3 on P105. I made a thin glass fibre which we saw light travelling through. Homework Answer Q5-6 on P106 and hand in by Thursday morning. Monday 02-03-2015 Total internal reflection Classwork We did this starter activity about refraction. We did a practical activity to measure the refractive index of a perspex block. We made some notes on total internal reflection and the formula for the critical angle. We did a short practical to see total internal reflection in a semicircular block. Homework Answer Q1-2 on P105. Hand in tomorrow morning. Watch this video about optical fibres. Thusday 26-02-2015 Snell's Law Classwork We used Snell's law to calculate unknown angles of incidence and refraction when light travels from air into a substance. We made brief notes on how to adapt Snell's law to answer questions when light moves from a substance into air. Tuesday 24-02-2015 Refractive index Classwork We went through the HW. We defined refractive index and did a few simple calculations. We started to look at Snell's Law. Homework Answer Q1-2 on P103 and hand in before Thursday morning. Monday 23-02-2015 Switch Mode Transformers Classwork We did some Qs on transformers (Q6-7 P208). We made some notes on switch mode transformers (see P205). We did some recap on reflection and refraction of light. Homework Answer Q1-3 on P99 and hand in tomorrow morning before reg. this video may help for Q2, although it does not really explain why this happens. Thursday 12-02-2015 Making a Transformer Classwork We did some practice questions on the transformer formulae. We assembled and tested a transformer. Tuesday 10-02-2015 Transformer formulae Classwork We added to your notes on transformers, and looked at these transformer formulae: V s/V p = n s/n p V pxI p = V sxI s Homework Answer Q1-2 on P207. Note: I forgot to post this yesterday, so deadline is extended to Thursday morning before reg. Monday 09-02-2015 AC generator, DC generator, dynamo Classwork We made notes on AC and DC generators, and how the voltage can be increased. We answered the questions on P203 and went through the ideal answers. We watched a dynamo in action, and made brief notes on how they work. Homework Read P204-5 of the textbook and watch this video. Make notes on these and bring to next lesson. Thursday 05-02-2015 The AC generator Classwork We did these questions on the generator effect. We started to examine the AC generator - more on this next lesson. Tuesday 03-02-2015 Induced current in a coil Classwork We went through the honework, and filled in any gaps in your answers. We added to our notes on inducing current in a coil. Homework Watch this video about AC generators, and read P202-3. There is no need to make notes on these, but I want you to familiarize yourself with the ideas so that we can make good progress next lesson. Monday 02-02-2015 Generator Effect Classwork We made some notes on the generator effect and watched a few demonstrations. You experimented with a magnet, a coil of wire, and a sensitive ammeter. We started to consider in detail the voltage induced in a coil by a moving magnet - more on this next lesson. Homework Answer Q1-2 on P201 and hand in tomorrow morning before registration. Thursday 29-01-2-15 Electric Motor Assembly Classwork We assembled a DC motor - most people got theirs working well. Tuesday 27-01-2015 The electric motor Classwork We went through the HW. We saw a demonstration of an electric motor, and watched an animation showing how it works. Next lesson you will assemble and test an electric motor. Homework I recommend you watch the video again, and read the bit on P199 about the electric motor. You only need to watch up to about 2 minutes - everything after that (when the extra coils get added) is optional but you may find it interesting. Monday 26-01-2015 Motor Effect Classwork We made notes on the motor effect and Fleming's Left Hand Rule, and saw a demonstration. Here is a video that might help you. We did some questions on the motor effect. Homework Answer Q1 on P209 and hand in tomorrow morning before registration. Watch the video linked above if you need more help. Thursday 22-01-2-15 Electromagnets Classwork We continued to make notes on electromagnets. We looked at a relay (see P197 and this video) and started to look at the electric bell. Note: I just found this video which explains the polarity of electromagnets if you missed the lesson. Thursday 11-12-2014 Past paper questions Classwork I gave out some more past paper questions - these are from specimen paper 1 here. The markscheme for specimen paper 1 is here. Homework Continue your revision for the mock - you can use any of the past papers on the AQA website. Monday 08-12-2014 Specific heat capacity and latent heat Classwork We went through Q6 of last week's homework. We did some revision of specific heat capacity and latent heat and answered these questions and these questions. Homework Please do this anonymous survey before next lesson. Revise for your mock - remember it does not invlude Chapters 11 or 18. Thursday 04-12-2014 Homework Feedback Classwork We went through the homework on some detail. We got up to Q6 - hopefully you should be able to have a good go at that now if you found it hard first time round. Tuesday 02-12-2014 No lesson due to Holocaust talks Monday 01-12-2014 Investigating Effifiency Classwork We did some recap questions on specific heat capacity (see P128-9 of the textbook). We measured the efficiency of a 12V incandescent bulb, and evaluated the result (it turned out to be an overestimate as we did not take into account heat lost to the beaker and surroundings). Homework Answer Q4,5,6 on P192 and hand in tomorrow morning before registration. Thursday 27-11-2014 Household Electricity - Recap Classwork We went through the homework and combined the formulae V=IR and P=IV. Tuesday 25-11-2014 National Grid Classwork We looked at a demonstration of the national grid, and saw that less power was wasted in the higher voltage power lines. We did the questions on P191. Answers here. Homework Answer Q1 Q3 and Q4 on P193. Hand in any time tomorrow. Monday 24-11-2014 Cost and Efficiency - Lighting Classwork We did some more calculations on cost of electricity, and made some notes on different types of light bulb (see P189). We comapred the cost of using different light bulbs over 20 years using this worksheet. Homework Watch and make notes on this video about the National Grid. Use P190-191 to help you. You need to know the approximate voltages of the different parts, and also appreciate why they bother to step the voltage up so high. Bring your notes to next lesson. Thursday 20-11-2014 Cost of electricity Classwork We calculated the cost of using different electrical appliances, and also the cost of leaving things like TVs on standby. Tuesday 18-11-2014 RCCBs Classwork We went through earthing and looked at how RCCBs work. Homework Watch and make notes on this video about calculating the cost of electricity. See also P187 of the textbook. Look around your house and record the power rating of five different appliances (you will often find the power rating on a sticker on the back) - e.g. hoover, kettle, microwave, tv, radio, hairdryer, phone charger, ... Bring the list no next lesson so we can use it. Monday 17-11-2014 Fuses and circuit breakers Classwork We made notes on fuses and circuit breakers, and watched a demonstration of fuse wire melting in different situations. If you missed the lesson watch this video. Homework Watch and make notes on this video about earthing. Read P180-181 and add to your notes - particularly about the fuse protecting the live wire. We will go over this lesson and also look at RCCBs (which are mentioned on P181). Thursday 13-11-2014 Cables, plugs, fuses Classwork We went through the homework and looked at fuses and how to calculate which fuse to use using the formula P = IV. We also briefly discussed circuit breakers and how they work. Tuesday 11-11-2014 Oscilloscopes, Mains and Rectification Classwork We did corrections for the oscilloscope homework. We looked at the voltage and frequency of mains electricity, and considered how a diode would affect current in a circuit with an AC power supply. Homework Watch this video about mains cables and plugs, and read P178-9 of the textbook. Make notes on both of these and bring your notes to next lesson. Monday 10-11-2014 Using Oscilloscopes Classwork We used oscilloscopes to measure the period, frequency and amplitude of an AC voltage across several components in a series circuit. Homework Complete both sides of this worksheet and hand in tomorrow morning before registration. Tuesday 14-10-2014 Circuits Questions Classwork We pracrised some questions about circuits. Homework Please watch and make notes on this video about alternating current. The main bit I am interested in is at the start where he compares AC with DC, however it will be useful to watch the later stuff about oscilloscopes too since you will use them soon. Monday 03-11-2014 Electricity Recap Classwork We defined voltage and current (which you have done before in Y9). We did some recap questions on P185 (we will go through Q3 next lesson). These involved the formulae: Q = I x t E = V x Q V = I x R We started to look at Alternating Current, but will do more on that later. Homework Recap on rules about voltage and current in series and parallel circuits by wathcing these videos. Make notes where necessary - you have covered all of this in Y9 but you may have forgotten some of it: We will then answer some questions using these ideas next lesson before moving on with AC and DC. Thursday 16-10-2014 Test Feedback Classwork We went through the test, then did some recap stuff on electrical circuits. Homework No homeowrk. Tuesday 14-10-2014 Test Classwork We did the test. You'll get your marks next lesson. Homework No homework. Monday 13-10-2014 Revision Classwork We experimented with hydraulic systems made from two syringes, and calculated how much they would multiply the input force by. We answered Q3-4 on P65. Homework Revise for test tomorrow. Thursday 09-10-2014 Past Paper Questions Classwork We started these past paper questions. The markscheme is here if you want to check before next lesson. Homework Continue your revision. Tuesday 07-10-2014 Force Multipliers Classwork We went through the problem from the homework. We made detailed notes on ratio methods for solving force multiplier problems. Homework Revise for test next week. Monday 06-10-2014 Hydraulic Systems Classwork We finished both sides of the sheet from last lesson and went through the answers. We used ratio methods for hydraulic systems and levers - we will make more detailed notes on these next lesson. We did this problem which combines hydraulics and levers. Homework Do the hard hydraulics question and hand in tomorrow morning before registration. REMEMBER TO HAND IN WHATEVER YOU HAVE DONE EVEN IF YOU HAVEN'T FOUND ALL THE ANSWERS. Homework clues: i) You can either use moments or use the ratio trick - the ratio of the forces is the opposite of the ratio of the distances from the pivot. ii) You know the force on piston P from part i). Use the hydraulics ratio trick to find the force at piston Q. iii) Use the formula work done = force x distance. iv) and v) You are on your own with these - do your best to figure it out. Tuesday 30-09-2014 Hydraulics Classwork We briefly went over the graphs completed for homework, and looked at the formula F = mv 2/r (though this is not required for GCSE). We started to introduce hydraulic systems. Homework Watch and make notes on this video on hydraulic systems. Then finish off the example in our notes to work out the upward force on the piston with the baby elephant on. Optional: find out how much a baby elephant weighs.
Thursday 25-09-2014 Moments & Circular Motion Classwork We finished off the worksheet on Moments and Stability. We did a practical to investigate the relationship between the speed and the centripetal force on a rubber bung moving in a circle. Homework Plot a graph with force on the x-axis and speed on the y-axis. Write a conclusion. Hand in TOMORROW MORNING before reg. Optional: plot a graph with speed 2 on the x-axis and force on the y-axis. What does this tell you?