PHYS 1023 Lecture 8: Chapter 8
24 Aug 2016
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Charge: objects charged in the same way repel each other, objects with different charge attract each other, experimentally 2 types of charge. Electrical force: charles coulomb experimented with electrical charge (q) Force decreases as distance increase: 2x distance > force down to 1/4 original, 3x distance > force down to 1/9 original, force proportional to inverse of distance squared, form is similar to gravity. This force is proportional to the amount of charge on each object, and promotional to the inverse of the square of the distance between them. 1 2 / 2: if electric charge is measured in coulombs , distance in meters, and force in newtons, then this proportionality becomes: = 9 10^9 1 2 / 2. What is a coulomb: coulomb (c, useful when working with circuits, 1 c is the charge of 6. 25 billion electrons. Distance between is greater than size: atom appear neutral form the outside.
