University:
Ontario Tech University
Course:
CHEM1010U | Chemistry I
Academic year:

2024
Views:

168

Pages:

7
Author:

Avneet S.

Static Electricity (Quiz Review) Electricity is the build-up movement or build-up of the movement of electrons. Electricity is the energy generated from the transfer of electrons. Two Main Forms of Electricity: Static Electricity When electrons are built up on an object, electrons do not move. Current Electricity (discussed later) Law of Electric Charges: Like charges repel. Unlike charges attract. (+) (-) (attract) (-) (-) (repel) (+) (+) (repel) (-) (+) (attract) (+) (n) (attract) (-) (n) (attract) (n) (n) (no effect) (+) (n) (attract) Electric Charges: Two types: (+) and (-) Object gains electrons, (-) charge. Object loses electrons, (+) charge. Object DOESN'T lose or gain electrons, neutral charge. Grounding: When an object is connected to Earth through a conductor (ex. metal wire) to let electricity pass. Discharged: When all extra charges have been removed from an object, leaving it neutral (without a charge). Electroscope Before: electroscope with leaves hanging down After: electroscope with leaves spread apart Types of Static Electricity: Friction (rubbing) 2 different neutral objects rub against each other, one has (+) and other has (-) ex. neutral balloon and human hair/cat fur ex. Rub glass with silk glass (+) charge silk (-) charge Substances with a greater hold on electrons can "steal" electrons from something with a weaker hold. **Practice Qs:** a. Glass rubbed with fur: * Fur GAINS electrons and becomes (-) * Glass LOSES electrons and becomes (+) b. Plastic is rubbed with silk: * Plastic GAINS electrons and becomes (-) * Silk LOSES electrons and becomes (+) c. Ebonite is rubbed with plastic: * Plastic GAINS electrons and becomes (-) * Ebonite LOSES electrons and becomes (+) d. Fur is rubbed with gold: * Gold GAINS electrons and becomes (-) * Fur LOSES electrons and becomes (+)