[問題] 兩題普物問題
跟電學有關
1. A cube of edge "a"(邊長) carries a point charge q at each corner.
Show that the resultant electric force on any one of the charge
is given by:
F = 0.262q^2 / εa^2
2. Two positive charges +Q are held fixed a distance d apart. A particle
of negative charge -q and mass "m" is placed midway between them, then is
given a small displacement perpendicular to the line joinging them and
relased.
Show that
the particle describes SHM of period = (εmπ^3d^3/qQ)^1/2
第二題我算的答案是 ("2"εmπ^3d^3/qQ)^1/2
麻煩各位幫忙解題一下 謝謝!!
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