This section is about applying some more advanced rules to circuits that build on your GCSE skills. The trick is to realise that you must be 100% logical and treat it as a mathematical exercise. If you set up the problems correctly then you cannot go wrong. Take note of these things that you must be able to do…
- Make sure you treat current and pd as having a direction.
- Learn how to apply reciprocal equations for 1/R for resistors in parallel
- Learn what the gradient and intercept mean on an Internal Resistance circuit graph
- Remember that a power source is a “real source” and will get warm so lose energy! A 3V cell does not output 3V!
- When thinking about potential dividers the trick is to realise that current is the same through each resistor. So setup two equations for V for each then I is the same for both!
13 DC Circuits (Main PPT)
13 DC Circuits Student Booklet (student booklet notes)
Donkey_Model (Think about how a model might help you?)
13.1 Circuit rules
5_1_kirchoffs laws (problem sheet)
13.2 More about resistance
5_2_Practical_investigating_resistors (Practical on Resistors)
5_2_practical_cons_energy (Practical sheet proving Kirchhoff’s laws)
resistor_cube_problem (Extension – 3D resistor cube problem – for fun!)
13.3 Emf and internal resistance
Internal Resistance Calculator (Hyper Physics)
5_3_EHT_Practical_Demo (teacher demo with results to graph)
5_3_Internal_Resistance Problems (probkems sheet)
5_3_IR_of_Battery variable current method (practical method 1)
5_3_IR_of_Cell adding bulbs method (practical method 2) Results 3 Cells (excel results)
5_3_IR_Practical_Higher_Ability
5_3_IOP_notes (extra reading from IOP)
13.4 More circuit calculations
5_4_Investigation_cell_combinations (Crucial practical which explores how PD behaves for series & parallel)
13.5 The potential divider
5_4_Potential_Dividers Worksheet
Youtube Video Tutorials “Electricity” – Steve4Physics
E10 Kirchhoff’s First Law
E11 Kirchhoff’s Second Law
E12 Resistors in series
E13 Resistors in parallel
E14 The resistance of series and parallel resistor combinations
E15 Internal Resistance 1 of 4
E16 Internal Resistance 2 of 4
E17 Internal Resistance 3 of 4
E18 Internal Resistance 4 of 4
E19 Potential (Voltage) Dividers
E20 Potentiometers
E21 Power in Electrical Circuits – Part 1 of 2
E22 Power in Electrical Circuits – Part 2 of 2
E25 Resistance and Temperature 1 of 3
E26 Resistance and Temperature 2 of 3. Semiconductors
E27 Resistance and Temperature 3 of 3 Superconductors
E28 Circuits – Problem Solving
Kirchhoff's Laws - A-level Physics
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00:00 Kirchhoff's 1st & 2nd laws
02:11 2nd law worked example[+] Show More
