February 2nd, 2012

TIL: Touching charged spheres MUST equalize potential. If you have two spheres of differing charges and differing radii, then from setting V1=V2 you get kQ1/R1=kQ2/R2 or Q1/R1=Q2/R2, if you know the radii and the total charge you’re done.  So much E&M forgotten…sigh.

Redo: 559, 560

Stopped page 599 problem 565.

Caltech Phy 1b problem set 4


So much fail. Return to redo most of them, remember to change units .-. k->1 so that 1/e_0=4pi


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