# Lecture Notes for PHYS 2086 - GEN PHYS-ELEC, MAGN & MOTION with Zhou at Montana Tech of the University of Montana (Montana Tech)

## Notes Information

 Material Type: Class Note Professor: Zhou Class: PHYS 2086 - GEN PHYS-ELEC, MAGN & MOTION Subject: Physics University: Montana Tech of the University of Montana Term: -- Keywords: Point ChargesApproachingTotal ChargeConservativePositive ChargeOn the GroundUnit VectorSuperpositionElectric ForceNegative Charges

## Sample Document Text

Review: Properties of Electric Charges „ There are two kinds of charges in nature: positive and negative; „ Charges of the same sign repel each other; and those of opposite sign attract one another; „ Total charge in an isolated system is conserved (positive = negative); „ Charge is quantized. Review Questions 1. How many types of charges in nature? 2. A glass rod rubbed with silk will attract or repel with a rubber rubbed with fur? 3. After a glass rod is rubbed with silk, it have a total charge of 1000 protons. How much charge does the silk have? Conductors „ Electrical conductors are materials in which some of the electrons are free electrons „ Free electrons are not bound to the atoms and can move relatively freely „ Examples : copper, aluminum and silver „ When a good conductor is charged in a small region, the charge readily distributes itself over the entire surface of the material New Concept Insulators „ Electrical insulators are materials in which all ...

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