A cylindrical capacitor as shown carries a total charge of +Q and-Q on the inner and outer conductors, respectively. Thecapacitor is not connected to the ground or to any voltage source.A dielectric washer, with inner and outer diameters matching thedimensions of the cylindrical capacitor, is placed x meters insidethe capacitor as shown in Figure P10.24
Figure 10.24:

(a) Find the electric field in the capacitor in terms of Q. Hint: (ρ1)x + (ρ0)(h-x) = Q , whereρ1 and ρ0 are line-charge densitiesin the dielectric and air regions, respectively. Also,

(b) Find the voltage between the two conductors.
(c) Find the force acting on the dielectric washer.

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