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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