Difference between revisions of "3-ELE-10"
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==Homework== | ==Homework== | ||
| + | * Finish any unfinished tables | ||
| + | * Research the concept of resistivity and find the resistivities of the following: | ||
| + | iron, copper, constantan, nichrome, silver, gold, | ||
| + | * Beware the following page [[http://en.wikipedia.org/wiki/Resistivity]] | ||
=Additional Information= | =Additional Information= | ||
Revision as of 04:22, 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
Plenary
- Pupils to summarise thier findings in two simple tables (length and average resistance, area and average resistance) and discuss their findings in general as a group. This will need to be finsihed prior to the following lesson for data analysis
Homework
- Finish any unfinished tables
- Research the concept of resistivity and find the resistivities of the following:
iron, copper, constantan, nichrome, silver, gold,
- Beware the following page [[1]]
