Induction: Induced & Permanent Charging
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Static electricity can be generated through: Friction, Conduction, INDUCTION
INDUCTION involves the movement of electrons in a neutral object when a charged object is brought close to the neutral object. The movement occurs WITHOUT DIRECT CONTACT between objects.
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Induced Charge Separation/ Temporary Charging
- When a negatively charged rod is brought close to a neutral metal rod, the electrons in the neutral rod move to one side of the object.
- The electrons move back when the charged object is removed.
- THIS IS A TEMPORARY CHARGE.
- There is no change in the number of electrons on the object, so overall THE OBJECT REMAINS NEUTRAL.
- When you take a temporarily charged object and ground it, the charged object retains its charge.
- This is called permanent charging by induction.
- Charging by induction always results in two objects with different charges.
- The object that induces the charge keeps its original charge, while the object whose charge was induced receives the opposite charge.