rate of flow of electrical charge is called current p2 4.2 charge on the move metals conduct...
TRANSCRIPT
Rate of flow of electrical charge is called current
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 ?
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.
+-
If the voltage is highenough the air molecules will ioniseand a spark dischargeoccurs.
-
Ionisation is the ability to remove electrons from atoms leaving a trail of positive ions.
Electrical potential energy or potential difference between the conductor and the ground
slowly and safely
( thick copper strip )