Difference between revisions of "4-ELC-02"
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=Additional Information= | =Additional Information= | ||
===Resources Required=== | ===Resources Required=== | ||
+ | 12x the following: | ||
+ | *5V power supplies | ||
+ | *10 ohm resistor | ||
+ | *20 ohm resistor | ||
+ | *30 ohm resistor | ||
+ | *simple ammeter | ||
+ | *simple voltmeter | ||
+ | *PASCO I-V sensor | ||
+ | *length of wire for 10 ohm resistor challenge | ||
+ | *wooden block to wind wire on | ||
+ | *2 x croc clips | ||
+ | |||
===Textbook References=== | ===Textbook References=== | ||
Revision as of 08:40, 8 January 2010
Contents
Outcomes
- Pupils can explain how changing resistance changes current
- Pupils can link voltage, current and resitance
Specification References
- 2.12 describe the qualitative effect of changing resistance on the circuit on the current in a circuit
- 2.15 recall and use the relationship between voltage current and reistance V=IR
Starter
Give pupils white boards ask them to draw a standard test circuit - i.e. a circuit which they can use to test any standard component (e.g. a resistor)
Pupils should include a power supply, ammeter (in series), a test component (e.g. a resistor), voltmeter (in parallel around the test component).
For bonus marks ask them to identify the positive terminal of their supply
Main Body of Lesson
- Invesitgate three different resistors (10 ohm, 20 ohm and 30 ohm), plot an I-V graph, find the gradient, make conclusions
- Make a 10 ohm resistor - classic. Give pupils a length of wire and ask them to make a 10 ohm resistor - either use trial and error (quick method) or plot graph of resistance against length and read off ideal value.
Plenary
Homework
Additional Information
Resources Required
12x the following:
- 5V power supplies
- 10 ohm resistor
- 20 ohm resistor
- 30 ohm resistor
- simple ammeter
- simple voltmeter
- PASCO I-V sensor
- length of wire for 10 ohm resistor challenge
- wooden block to wind wire on
- 2 x croc clips