Electrical Energy, Power & Resistance

Unit: Electrical Energy, Power & Resistance
Number of lessons: 6

This bundle includes all six lessons in my unit Electrical Energy, Power & Resistance. It is specifically linked to the OCR Physics A Specification, but should apply to most A Level Physics courses.

The lessons cover the following points:

1. Energy transfers within a circuit
2. Definitions of e.m.f. and p.d.
3. Equations for p.d.
4. Base units of the volt
5. Definition of electrical resistance
6. Base units of the ohm
7. Practical to determine resistance of a coil
8. Ohm’s law
9. Determining resistance from an I-V graph
10. I-V characteristics of resistors, lamps, diodes and thermistors
11. Demonstration of how resistance changes with temperature
12. Explanation of the I-V curve for filament lamps
13. Practical to investigate NTC thermistors
14. Uses of LDRs
15. Practical to investigate LDRs
16. Explanation of resistance curve for LDRs
17. Practical to look at factors that affect resistance
18. Derivation of equation for resistivity
19. Practical to determine resistivity
20. Comparing resistivities of metals, semiconductors and insulators
21. How resistivity changes with temperature
22. Graphical analysis to determine resistance
23. Definitions and equations for power
24. Exam-style questions
25. Loads of questions and problems

There are detailed teacher notes in the ‘Notes’ section of each slide, including answers where required.

My first unit of electricity lessons (Electricity, Charge & Current) is available free of charge for you to see the style I employ.