Force on a Dielectric in a Capacitor
A dielectric slab with dielectric constant κ is partially inserted between the plates of a parallel-plate capacitor. The slab experiences a force that pulls it farther into the region between the plates. This force is primarily due to:
A
Coulomb attraction between the dielectric and the plates
B
Thermal expansion of the dielectric material
C
Magnetic forces from currents in the connecting wires
D
The system moving toward a state of lower potential energy
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