Y6 scientists investigating electricity…15th June

Y6 scientists investigating electricity…15th June

How many factors can you think of which may affect the brightness of a bulb in circuit? Voltage of battery?  More batteries?  More bulbs? How about the length of wire in the circuit?  Y6 investigated all these but it was the latter that seemed to have little or no effect.  We built the longest circuits we could, but it was only when the length of wire reached about 15m that there was any appreciable dimming of the bulb.  Hmmm…

Then we made some steady-hand testers and let Y2 try them out.