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Lead Circuit with Pencil

Components :

  • Switch(on/off)
  • led
  • 9v battery with cap
  • Resistor
  • Pencil
  • Eraser

Concepts :
Conductor of electricity

Explanation :
Here the fact that lead in a pencil conducts electricity is used to transfer electric current from one end of the pencil to the lead at the opposite end (where leds are connected). The leds after receiving current start conducting. It is powered by a 9V battery and controlled by a Simple on/off switch.

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