Difference between revisions of "3-ELE-10"
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*Pupils to investigate how csa affects resistance | *Pupils to investigate how csa affects resistance | ||
| − | Pupils to record their results on [[media:V_I_investigation_results_table.xls | preprtinted table]] to save time | + | *Pupils to record their results on [[media:V_I_investigation_results_table.xls | preprtinted table]] to save time |
==Plenary== | ==Plenary== | ||
Revision as of 04:18, 13 May 2008
Contents
Outcomes
- Pupils can plan a Current-Voltage investigation
- Pupils can select the correct equipment and use an appropriate circuit to take valid measurements
Specification References
2.14 recall and use the relationship between voltage, current and resistance: voltage = current × resistance
Starter
Pupils to design a circuit to design a circuit from:
a power supply, a variable resistor, an ammeter, a voltmeter, some sample wire
Pupils to consider how to make the experiment as accurate as possible
Main Body of Lesson
Planning:
- Identify what factors could affect resistance of a wire (length, csa, material, temperature)
- Discuss how to make the experiment fair (control variables) and accurate (several values of V and I)
Observation:
- Pupils to investigate how length affects resistance
- Pupils to investigate how csa affects resistance
- Pupils to record their results on preprtinted table to save time
