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 )