Two large parallel conducting plates are 8.0 cm apart and carry equal but opposite charges on their facing surfaces. the magnitude of the surface charge density on either of the facing surfaces is 2.0 nc/m2. determine the magnitude of the electric potential difference between the plates.

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?