Learning Objectives
-- draw circuit diagrams with power sources (cell or battery), switches, lamps, resistors (fixed and variable), fuses, ammeters and voltmeters, bells, light-dependent resistors, thermistors and light-emitting diodes
--state that the current at every point in a series circuit is the same and apply the principle to new situations or to solve related problems
--state that the sum of the p.d.'s in a series circuit is equal to the p.d. across the whole circuit and apply the principle to new situations or to solve related problems
--state that the current from the source is the sum of the currents in the separate branches of the parallel circuit and apply the principle to new situations or to solve related problems
-- state that the potential differences across the separate branches of a parallel circuit is the same and apply the principle to new situations or to solve related problems
--* show an understanding of conservation of charges and energy
-- recall and apply the relevant relations, including R = V/I and those for potential differences in series and in parallel circuits, resistors in series and in parallel, in calculations involving a whole circuit
--describe the action of a variable potential divider (potentiometer)
--describe the action of thermistors and light-dependent-resistors and explain their use as input transducers in potential dividers
-- solve simple circuit problems involving thermistors and light-dependent resistors
--* show understanding of the structure and operation of CRO
-- describe the use of a CRO to display waveforms and to measure p.d.’s and short time intervals of time (detailed circuits, structure and operation of the CRO are not required
-- interpret CRO displays of waveforms, p.d.’s and time intervals to solve related problems

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DC circuit activity : Explore simple DC circuits with the following simulation.
Circuit Construction Kit (DC Only)
Click to Run

Learn more about DC circuits from the following websites
http://www.ylearn.co.uk/ Access code : DCcircuit





Examples of DC circuits
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/dcex.html
http://www.wisc-online.com/Objects/ViewObject.aspx?ID=DCE10504
http://www.bbc.co.uk/scotland/learning/bitesize/standard/physics/using_electricity/useful_circuits_rev1.shtml


Variable resistors

Go the following sites to learn about variable resistors.
http://vle.hci.edu.sg/physics/A-level%20Absorb%20Physics/units/020201.html
http://www.ylearn.co.uk/ Access code : Variableresistors
http://www.gcsescience.com/piresistance.htm
http://www.passmyexams.co.uk/GCSE/physics/diodes_LDR_thermistors.html
http://www.bbc.co.uk/scotland/learning/bitesize/standard/physics/electronics/input_devices_rev1.shtml

Diodes



Try a simple quiz to test your understanding of variable resistors.
http://www.gcsescience.com/q/qresdlt.html


Learn about CRO and its uses.