Static Electricity
Check out this link to roll a can with static electricity... Science Bob.
Try an experiment to test this out...
Static Electricity Experiment
They say opposites attract and
that couldn't be truer with these fun static electricity experiments.
Find out about positively and negatively charged particles using a few
basic items, can you control if they will be attracted or unattracted to
each other?
What you'll need:
- 2 inflated balloons with string attached
- Your hair
- Aluminium can
- Woollen fabric
Instructions:
- Rub the 2 balloons one by one against the woollen fabric, then try moving the balloons together, do they want to or are they unattracted to each other?
- Rub 1 of the balloons back and forth on your hair then slowly it pull it away, ask someone nearby what they can see or if there's nobody else around try looking in a mirror.
- Put the aluminium can on its side on a table, after rubbing the balloon on your hair again hold the balloon close to the can and watch as it rolls towards it, slowly move the balloon away from the can and it will follow.
What's happening?
Rubbing the balloons
against the woollen fabric or your hair creates static electricity. This
involves negatively charged particles (electrons) jumping to positively
charged objects. When you rub the balloons against your hair or the
fabric they become negatively charged, they have taken some of the
electrons from the hair/fabric and left them positively charged.
They say opposites
attract and that is certainly the case in these experiments, your
positively charged hair is attracted to the negatively charged balloon
and starts to rise up to meet it. This is similar to the aluminium can
which is drawn to the negatively charged balloon as the area near it
becomes positively charged, once again opposites attract.
In the first
experiment both the balloons were negatively charged after rubbing them
against the woollen fabric, because of this they were unattracted to each
other.
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