An electron is accelerated through a potential difference V1 and then directed i

Question

An electron is accelerated through a potential difference V1 and then directed into the region between two metal plates, with an inital velocity parallel to the plates. A potential difference V2 is applied between the plates, and this deflects the electron through an angle THETA. Which of the following changes would be momst effective in increasing the angle of deflection?
A) Increase V1 and increase V2

B) Increase V1 and ddecrease V2

C) Decrease V1 and increase V2

D) Decrease V1 and decrease V2

E) None will increase angle of deflection

Explanation / Answer

For this case if V2 would increase then deflection would be more

and if V1 is also less then it would get more time to deflecte between the plates so the deflection angle would be more if V decreases

Option C is correct V1 decrease and V2 increase

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