Estimate the electrostatic force between two protons in a nucleus (simple Coulomb’s law … hint: assume the distance between the protons is roughly the size of a nucleus… which can be looked up, okay as low-medium difficulty exam problem)

22-17 (complex Coulomb’s law with components)

22-22 (Coulomb’s law, force on charge in electric field, relevant and timely biological connection)

22-23 (electric field practice)

22-25 (electric field practice, okay as simple exam problem)

22-29 (electric field + constant force problem, connection to const accel mechanics, very relevant … technique is used in conventional video screens function … good for exam problem, but I wouldn’t give as many parts, medium to difficult for exam)

22-56 (this would be a difficult exam problem, but fair game with the hint about how to treat the angles when they are small)

22-35 (calculation of electric field from point charges, uses components, straightforward if you are okay with components)

22-71 (study of E field calculation from continuous charge distribution and practice with evaluating the field in limiting cases, good practice … not so great for an exam as it stands)

22-73 (another example of an important interface between gravity and electromagnetism … very important locally to Xerox people! Good as simple to medium difficulty exam problem)

22-50 What gives rise to the torque? (intro to dipoles with chemistry example, we’ll do more with dipoles later)