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In: Physics

a. Represent atoms by small circles that can be charged, neutral, or have a permanent dipole...

a. Represent atoms by small circles that can be charged, neutral, or have a permanent dipole moment represented by an arrow within the circle. Show in a sketch how two such atoms interact in the following cases (show the direction of the force and/or torque on each atom): (i) one charged and one neutral atom; (ii) one charged and one polar molecule; (iii) and both dipolar molecules with parallel dipoles.

b. For a parallel plate capacitor, how does the capacitance change if (i) the plate areas are doubled, (ii) the voltage across the capacitor is halved, (iii) the plate separation is halved, (iv) the material between the plates is changed to one with twice the dielectric constant, (v) the charge on the capacitor is doubled?

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