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Electricity . Static & Dynamic. Static Electricity. Static electricity: A stationary electrical charge that is built up on the surface of a material. There are three ways to transfer negative charges from one substance to another: Friction Conduction Induction . Friction:
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Electricity Static & Dynamic
Static Electricity Static electricity: A stationary electrical charge that is built up on the surface of a material. There are three ways to transfer negative charges from one substance to another: • Friction • Conduction • Induction
Friction: When two neutral objects are rubbed against one another, the negative charges travel to the object with the greater affinity for the charges. Triboelectric series: Plastic Gold Nickel Cotton Paper Silk Wool Glass EXAMPLE: PLASTIC ruler rubbed on a WOOL cloth. The plastic ruler will be _______. The wool will be __________. Tendency to TAKE electrons
Conduction occurs when a charged object A touches a neutral object B. Objects A and B will then share the same charge. Induction occurs when a charged object A is brought close to a neutral object B; opposite charges on the surface of object B are attracted to object A.