Click here to go to Springpad for my lesson notes
NCEA Information ****************************************
Click here to go to the Acheivement Standard AS90523 Demonstrate understanding of electrical systems
Past papers 2005, 2006, 2007, 2008, 2009, 2010, 2011
Answer schedules 2005, 2006, 2007, 2008, 2009, 2010, 2011
Useful websites
CAPACITOR Animation showing flow of charges in a DC capacitor circuit. http://micro.magnet.fsu.edu/electromag/java/capacitor/index.html CHARGE Description of capacitors and charge http://hyperphysics.phy-astr.gsu.edu/hbase/electric/capac.html RESISTOR-CAPCITOR CIRUIT Graphs of voltage and current, adjust the values of the components. Need to click on close switch a couple of times to get graph to show. http://www.lon-capa.org/~mmp/kap23/RC/app.htm RC TIME CONSTANT Graph showing time constants of RC circuit, values can be adjusted. http://micro.magnet.fsu.edu/electromag/java/timeconstant/index.html http://www.lon-capa.org/~mmp/kap23/RC/app.htm caps series and parrallel values http://www.lon-capa.org/~mmp/kap19/RR480app.htm CAPACITOR Youtube clip showing a large capacitor being discharged with a screwdriver! http://www.youtube.com/watch?v=ZA25ghMAyak LENZ’S LAW Move a magnet in and out of a ring to observe induced current http://micro.magnet.fsu.edu/electromag/java/lenzlaw/index.html INDUCTORS AND BACK EMF Applet that explain how a voltage is induced across an inductor when the current through it changes. http://www.magnet.fsu.edu/education/tutorials/java/backemf/index.html AC and DC GENERATORS Animation and graph of voltage output for DC generator. Scroll down for AC generator (alternator). http://www.physclips.unsw.edu.au/jw/electricmotors.html#mandg AC GENERATOR Animation http://micro.magnet.fsu.edu/electromag/java/generator/ac.html AC ELECTRICITY – notes http://www.physics.sjsu.edu/becker/physics51/ac_circuits.htm AC ELECTRICITY More notes with animations of the voltage and current phasors for resistors, capacitors and inductors. http://www.animations.physics.unsw.edu.au/jw/AC.html#resonance RLC CIRCUIT AND RESONANCE Lots of notes on RLC and impedance BUT scroll to bottom of page to see graph showing resonance and adjust component values to see how resonant frequency is affected. http://mysite.verizon.net/vzeoacw1/impedance.html
NCEA Physics Pages 
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