Exam (elaborations)
Static Charge
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Exam of 3 pages for the course LPSP1202 - Chapitre 12 - Troubles du sommeil at LPSP1202 - Chapitre 12 - Troubles du sommeil (Static Charge)
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Static Charge✅
What does static charge mean?- Static charge refers to electric charge
that can be held in one place (aka static electricity)
✅
What are examples of static electricity?- A lightning strike
Dusters that attract dust
Crackles when combing hair
Plastic wrap sticking to your hands
Dust being attracted to television screens
Clothes clinging to each other in a dryer
Getting a shock after rubbing your feet on a carpet and then touching a
metal object
✅
Where does static charge come from?- All materials are made of atoms,
which contain electric charges
There are electrons around the atom, which are negative
There are protons in the centre of an atom, which are positive
An atom has an equal amounts of positive and negative charges, so the
atom had no overall charge
Electrons do not always stay attached to atoms and can sometimes be
removed by rubbing
✅
How does static charge build up?- It can build up when two insulating
materials are rubbed together, such as a plastic comb moving through hair
✅
What causes electrons to be transferred from one material to
another?- Friction
✅
When you rub two insulators together, what happens to the charges of the
two insulators?- One material ends up with more electrons, so it has an
overall negative charge
One material ends up with fewer electrons, so it has an overall positive
charge
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