Circuit simulator
https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc
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HW solutions
Charge HW to submit on Friday 1. What exactly IS charge? How do we think of it? How does it relate to protons, electrons, etc.? A way of quantifying how particles interact with each other, based on the amount (and imbalance) of protons and electrons. Neutrons have zero charge. Electrons have opposite charge relative to each other. 2. Which particles in an atom are easiest to move, and why? Electrons, as they are "around" the nucleus of the atom. 3. What does atomic number (H = 1, He = 2, etc.) mean? The number of protons in the nucleus of the atom. 4. What are quarks Fundamental particles, incapable of being broken up further. There are 6 types, 2 of which (up and down) make up protons and neutrons. 5. Coulomb’s law is an “inverse square law” – what...
Charge! (The details.)
Intro to electricity Electricity I - Charge! Charge - as fundamental to electricity (& magnetism) as mass is to mechanics Charge is a concept used to quantatively related "particles" to other particles, in terms of how they affect each other - do they attract or repel? If so, with what force? Charge is represented by letter Q. The basic idea - likes charges repel (- and -, or + and +) and opposite charges attract (+ and -). Charge is measured in units called coulombs (C). A coulomb is a huge amount of charge, but a typical particle has a tiny amount of charge: - the charge of a proton is 1.6 x 10^-19 C. Similarly, the charge of an electron is the same number, but negative, by definition (-1.6 x 10^-19 C). The negative sign distinguishes particles from each other, in terms of whether or not they will attract or repel. The actual sign is arbitrarily chosen. The charge of a neutron is 0 C, or neutral. But what IS charge? Charge is a bit difficul...