PINWHEEL WIND TURBINE
Make a pinwheel to see how a very basic turbine work to produce electricity see how wind create mechanical force.
Requirements-
*Cardstock
*Pencil with eraser
*Straight pin or thumbtack
*Small electric motor
*Alligator clip leads or insulatered copper wire
*1-5 volt bulb & bulb holder
*Strong fan
Method to make
Part 1-
1-cut a piece of Cardstock into a 4 'square'
2-Use a rular to draw diagonal lines from corner to corner. Make a small mark each line 3/4 of an inch from centre of the square.
3-Cut along the diagonal line towards the center until you reach the 3/4 inch mark.
4- Fold the corners marked with circles on the pattern into the centre and stable the layers together When all four blade are folded in stick a straight pin or thumbtack through all the layers at the centre. Push the pin through the eraser on the pencil to finish the pinwheel.
5- Hold the pinwheel infront of a fan and watch it spin the currents of air comming from the fan catch the curved part of the blade causing them to spin
Part-2
- Remove the pinwheel from the pencil and punch the shaft of the motor through the centre.If your motor came with a little cap for the end of the shaft put that on to hold the pinwheel in place.If you dont have a cap use a piece of clay or cork.
2- Use the alligator bulb clip leads to connect the motors wires to the light bulb
3- Now hold the motor/pinwheel close infront of the fan again.Does the bulblight up ?Look closely- you should at least see the filament begin to glow & it depend the size of turbine or motor to much brightness.
What happened-
When you attached the motor to the pinwheel and put it infront of the fan you transformed the motor into a generator which converts mechanical force to electricity.It does this with help of a magnet inside the motor when you made a complete electricity circuit, allowing the electricity to flow from the motor through the bulb and back again.
Note- After the constitution was presented to the constituent Assembly, they took two years. eleven months and seventeen days to pass it.
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