Charge
Electricity and Magnetism

Static Spinning Straw

Enrichment Activity for 5-11 11-14


What you need

  • A drinking straw
  • Plastic bottle cap
  • A jumper
  • Your hands

Instructions

  1. Place the plastic bottle cap on a table.  Rub the straw with a jumper several times in the same direction and then carefully balance the straw on the cap
  2. Bring one hand close to the straw, but don’t touch it. The straw will start to spin!
  3. Experiment with where to put your hand to get the best response. Does one end of the straw respond better than the other? Does using two hands rather than one make a difference?

Results and Explanation

Rubbing the straw makes it negatively charged and this induces a positive charge in your hand. The attraction between the straw and your hand makes the straw follow your hand as you move it.

Charge
can be determined for a Positron Muon Tau W Boson Z Boson Proton Quark
can be determined for an Electron Antitau Antimuon Antiquark
is used in analyses relating to Ionisation
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