Light Bulb Resistance
Added by Craig Napier on Dec 15, 2008
This activity uses circuit models to show that a bulb's resistance will increase with increasing current, and explains that this is due to the bulb filament warming up. Pupils should be able to analyse their results by scaling and plotting a line graph, and describe a graph with a dependent variable that has a decreasing rate of increase.
This item teaches:
- about the relationship between the resistance of a bulb and the current flowing through it
- The pupils should know that a bulb's resistance increases with increasing current.
- The pupils should know that the resistance increase is due to the bulb filament warming up.
- The pupils should be able to scale and plot a line graph from a table.
- The pupils should be able to describe a graph with a decreasing rate of increase of the dependent variable.
- Related Items
- This Author
Resistance and Current in a Bulb
This activity uses circuit models to show that a bulb's resi...
This activity introduces light dependent resistors, LDRs, an...
This activity teaches that a thermistor is an electronic com...
View the circuit of a darlington pair.
A simple generator experiment
Learn about generators in this simple experiment.
Speed - Basics
This activity introduces the basics of speed, teaching pupil...
Light Rays 2 - Shadows
In this activity pupils move light sources around in a dark ...
X-Rays in Medicine
This activity introduces X-rays: their absorption properties...
Colours of Light
This activity introduces the primary and secondary colours o...
This is a model of a pinball machine. The aim of this demon...