A dipole consisting of charges PlusMinus e, 222 nm apart, is placed between two

Question

A dipole consisting of charges PlusMinus e, 222 nm apart, is placed between two very large (essentially infinite) sheets carrying equal but opposite charge densities of 122 mu C/m^2. What is the maximum potential energy this dipole can have due to the sheets?_____J How should it be oriented relative to the sheets to attain this value? SmallCircle parallel to the sheets SmallCircle perpendicular to the sheets What is the maximum torque the sheets can exert on the dipole?_______N middot m How should it be oriented relative to the sheets to attain this value? SmallCircle parallel to the sheets SmallCircle perpendicular to the sheets What net force do the two sheets exert on the dipole?______N

Explanation / Answer

(a)

PE_max = pE = qd ( sigma/eo) = 1.6 * 10^-19 ( 222* 10^-9) ( 122 * 10^-6)8.85 * 10^-12 = 4.89 * 10^-19 J

parallel to the electric field with positive charge of dipole towards the positive plate

(b)T_max = p E = qd ( sigam/eo) = 1.6 * 10^-19 ( 222* 10^-9) ( 122 * 10^-6)8.85 * 10^-12 = 4.89 * 10^-19 J

perpendicular to the electric field ( parallel plates)

(c)

net force exerted on the dipole Fnet = 0

  

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