Transcript P2 4.2 ..Charges on the move

P2 4.2
Charge on the move
Metals conduct electricity
because they contain
conduction or de-localised
electrons
To which terminal of a cell (battery)
are the electrons attracted ?
Rate of flow of electrical charge
is called current
Electrons in the metal object are repelled by the negatively charged rod
Because ‘like charges repel”
Electrons in the metal object are repelled by the negatively charged rod
Because ‘like charges repel”
If the rod touches the conductor
electrons flow off the rod and onto the conductor
leaving both objects negatively charged
ELECTRICAL DISCHARGE
-
+
A charged conductor
can be discharged by
connecting it to earth.
Electrical potential energy or
potential difference between
the conductor and the ground
If the voltage is high
enough the air
molecules will ionise
and a spark discharge
occurs.
-
Ionisation is the ability to remove electrons
from atoms leaving a trail of positive ions.
( thick copper strip )
slowly and safely