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Find the potential at a distance from a proton. What is the potential difference between two...

Find the potential at a distance from a proton. What is the potential difference between two points that are 1.00 cm and 2.00 cm from a proton? Note that V = 0 at r = ∞.

Primary objective:

i) Please explain why the answer should be V2-V1 or V1-V2

ii) Please note i guess there are two parts of the question, "Find the potential at a distance from a proton." ( this is about derivation using, v = 0 at r = infinity)

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