6) Two large plates are given opposite charges. A proton is placed between the p

Question

6) Two large plates are given opposite charges. A proton is placed between the plates.

6A) Would the potential energy of the proton increase or decrease if it were moved towards the positive plate? Use the words force, work, and energy in your answer.

6B) If the potential difference between the plates is 135 V, determine the amount of work done in moving the proton from one side of the plates to the other.

6C)If the electric field between the plates is 575 N/C, determine the distance between the plates. The potential difference between the plates is still 135 V.

6D)If the capacitance of the two plates is 7 F, calculate the charge that has been placed on the plates. The Potential difference between the plates is still 135 V.

Explanation / Answer

6A) on moving the proton toward positive plat potential energy of the proton increases since the direction of force due to electric field is toward the negative plate and a force is required to move the proton in opposite direction. thus by doing positive workdone which increases potential energy of the proton

b) workdone = qV = 1.6*10^-19 *135 = 2.16810^-17 N or 135eV
c) E = v/d = 575 = 135/d = d = .2348

d)q =CV = 7*10^-6*135 = 9.45*10^-4C

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