Static electricity (2.5) Flashcards
What happens when certain insulating materials are rubbed against each other?
they become electrically charged
(…) charged electrons are rubbed off one material and on to the other
Negatively
The material that gains electrons becomes (…) charged
negatively
The material that loses electrons is left with an (…) (…) charge
equal
positive
What happens when two electrically charged objects are brought close together?
they exert a force on each other
Two objects that carry the same type of charge (…)
repel
Two objects that carry different types of charge (…)
attract
Attraction and repulsion between two charged objects are examples of (…) force
non-contact
Rubbing surfaces produces (…)
static electricity and sparking (can hurt)
What happens when a cloth is rubbed against a polystyrene rod?
The friction causes electrons to gain energy.
Electrons gain enough energy to leave the atom and ‘rub off’ onto the polythene rod.
polystyrene rod now negatively charged, cloth now equally positively charged
What causes electrons to ‘rub off’ onto a different material?
friction
When is static electricity created?
when electrons are transferred from one material to another
What does an electrically charged object create?
an electric field around itself
How does the strength of the electrical field change in relation to the distance between the charged object and itself?
The electric field is strongest close to the charged object.
The further away from the charged object, the weaker the field.
A second charged object placed in the field experiences what?
a force
Draw the electric field pattern for an isolated positive charged sphere
Draw arrow at end of line (furthest from ball)
Draw the electric field pattern for an isolated negative charged sphere
Draw arrow at end of line (touching ball)
