Electricity and Magnetism - Lecture Slides | PHYS 104, Assignments of Physics

Download Electricity and Magnetism - Lecture Slides | PHYS 104 and more Assignments Physics in PDF only on Docsity! 1 PHYS 104 General Physics II Electricity and Magnetism www.physics.drexel.edu/~gyang/physics104.htm Course website: Chapter 15 Electric Forces and Electric Fields Assignments for the week: Reading 15.1 - 15.6 Recitation problems: Ch. 15: CQ-4, 7, 8, 16, 17, 21; P-1, 2, 6, 9, 10, 12, 15, 20. Homework problems (Due: Monday 01/14/2008) Ch.15: P-8, 18. 2 Benjamin Franklin (1706 – 1790) In1740’s, Franklin worked on electricity and changed unrelated observations into coherent science. He found that there were two types of charges, and name them positive and negative. 1. Properties of Electric Charge (a) What is the origin of electricity? The electric nature of the matters is inherent in the atoms of all substances. A model atom Nucleus Proton, positively (+) charged Neutron, not charged Electron, negatively (-) charged Number of electrons = number of protons Charge on an electron = - charge on a proton. Atoms are electrically neutral.