Consider a path with discrete points A,B,C,D and E. It takes 2 pJto move an elec

Question

Consider a path with discrete points A,B,C,D and E. It takes 2 pJto move an electron from A to B or from B to C. It takes 3 pJto move a proton from C to D. It takes no energy to move anelectron from D to E.

a. What is the potential difference (in volts) between A and B?(Assume + refrence at B)

b. What is the potential difference (in volts) between D and E?(assume + refrence at E)

c. What is the potential difference (in volts) between C and D?(assume + refrence at D)

d. What is the potential difference (in volts) between D andB(assume + refrence at D)

Explanation / Answer

it takes 2pJ to move an electron from point A to B andsimilarly from point B to C. so, potential difference between A and B is2*10-12/1.6*10-19volts=1.25*107volts.(Bbeing at a higher potential) similarly potential difference between C and D is3*10-12/1.6*10-19volts=1.875*107volts(Cbeing at a higher potential) since it takes no energy to transfer charge from D to E soptential difference between D and E is 0 potential difference between D and B is(1.875-1.25)*107volts=.625*107volts(B beingat a higher potential)

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