# Answer to Question #57331 in Electromagnetism for Pekka

Question #57331

An electric charge is uniformly distributed with volume density

ρ = 10−8 C/m3 between two infinite parallel plates which are d

= 2 cm apart. Calculate the electric flux density D(x) due to this

charge distribution and plot schematically its dependence on x.

Now imagine that a point charge q = 1.5 × 10−8 C is placed in the

median plane (the plane parallel to the two plates, midway between

them) of the charge distribution and determine what is the work

that the electrostatic force has to do in order to move q to a point

P, located outside the region where the charge is distributed, at a

distance h = 3 cm from the nearest plate.

ρ = 10−8 C/m3 between two infinite parallel plates which are d

= 2 cm apart. Calculate the electric flux density D(x) due to this

charge distribution and plot schematically its dependence on x.

Now imagine that a point charge q = 1.5 × 10−8 C is placed in the

median plane (the plane parallel to the two plates, midway between

them) of the charge distribution and determine what is the work

that the electrostatic force has to do in order to move q to a point

P, located outside the region where the charge is distributed, at a

distance h = 3 cm from the nearest plate.

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