Elenco Snaptricity® - Manual (Page 68)

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String Generator Project #58
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1mA
1mA
FOR ADVANCED USERS - ADULT SUPERVISION RECOMMENDED
If you can spin the shaft really fast
then you may be able to light the
lamp:
This circuit shows how much more
current is produced when you spin
the motor shaft faster.
Description
Using the string, make a small loop at one end and put it on
a prong of the motor (M1) top. Wind a few feet of the string
around the motor shaft (wind it so that pulling the string will
spin the motor shaft clockwise). Then pull the string gently
but fast, watching the current produced in the meter. Get an
adult to help with this if needed.
If you wind the string well and pull it fast, you can move the
meter on the 1A scale. If not, you can use the 1mA scale
to easily see the effect.
A spare motor top is included with this kit in case you break
any of the prongs on the motor top. Use a screwdriver to
pry off the broken piece, then push the new one on.
Operation
Build the circuit and set the meter (M5) to either the 1mA or
1A scale.
Assembly
In many power plants, coal or oil is
burned to heat water creating steam,
which spins a turbine to make electricity.
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