A proton and electron are in between two oppositely charged parallel plates as s

Question

A proton and electron are in between two oppositely charged parallel plates as shown. THe charges onl interact with the plates, not each other.

a) In what direction does the potential energy of each charge decrease (if at all)?

b) in what direction does the force acting on each charge decrease (if at all)?

c) if the charge on each of the plates is doubled, what happens to:

i. the electric field between plates

ii. the potential energy of each charge

iii. the force acting on each charge

iv. the capacitance of the two-plate configuration

v. the energy stored between the plates?

Explanation / Answer

a) For proton potential energy will decrease as it moves towards negative charge and reverse for electron b) Force will remain constant for both it will not change c) If the charge is doubled then i) electric field is 4 times ii) potential energy is 2 times iii) force will be 4 times increase iv) Capacitance will not change v) energy will be 4 times

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