Physics 2.0 / 5 based on 1 rating ? PhysicsElectricityGCSE Created by: RachaelCreated on: 19-04-08 20:06 charge and current The rate of flow of electrical charge is called the current. Metals conduct electricity as the have delocalised electrons. Insulators can't conduct electricity as their elctrons are held in atoms. 1 of 4 charging a conductor A conductor can only hold charge if it is insulated from the ground. To charge an insulated conductor, it needs to be brought into contact with a charged object. 2 of 4 Discharging To discharge an object it needs to have a conducting path to the ground, causing it to be "earthed". The more charge a conductor has the greater the potential difference between the conductor and ground. When the potential difference becomes greate enough a spark is created between the eath and the object (e.g. lightening) 3 of 4 summary Electrical current is the rate of flow of charge. A metal object cannot be charged unless it is insulated from the ground. You can earth and object by creating a path to the ground. if a metal object gains toom much charge it craetes a spark. 4 of 4
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