How to find potential difference between 2 parallel deflection plates

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SUMMARY

The discussion focuses on calculating the potential difference (ΔV₂) between two parallel deflection plates in an electric field. Key values provided include an initial potential difference (ΔV1) of 1.38 kV, a distance between plates (Δx) of 5 cm, and a charge (q) of 1.6 x 10^-19 C. The relevant equations include ε = ΔV/d and W = ΔEe = qΔV, which are essential for determining the potential difference based on the electric field and charge. The conversation highlights the importance of relating energy gained by a charge to its kinetic energy for solving related problems.

PREREQUISITES
  • Understanding of electric fields and potential difference
  • Familiarity with basic physics equations involving energy and charge
  • Knowledge of kinematics, particularly relating velocity to energy
  • Concept of electric force and its relation to charge and electric field
NEXT STEPS
  • Study the relationship between electric potential and kinetic energy using the equation 1/2 mv^2 = eV
  • Learn how to calculate electric field strength (ε) using ε = ΔV/d
  • Explore the concept of electric force (Fe) and its calculation using Fe = kq1q₂/r²
  • Investigate the application of potential difference in cathode-ray tube (CRT) technology
USEFUL FOR

Students studying physics, particularly those focusing on electromagnetism, as well as educators and anyone involved in experiments with electric fields and particle motion.

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Homework Statement


Describe by pointform how to find potential difference between parallel deflection plates, ΔV₂ = ?
You don't have to solve.

ΔV1 = 1.38 kV
Δx = 5 cm
Δy = 0.49 cm
r = 5.2 cm
q = 1.6 x 10^-19 C
m = 9.11 x 10^-31 kg
k = 9 x 10^9 Nm^2/C^2

Homework Equations


ε = ΔV/d
W = ΔEe = qΔV
V = kq/r
Fe = kq1q₂/r^2
Fe = qε
Ee = kq1q₂/r

The Attempt at a Solution


i don't have the velocity so i don't know how. If i did have velocity i would find time.
 

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Last edited:
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I am on thin ice here, but its ok I am happy making a fool out of myself

Don't you use the potential between the cathode and the anode and the charge on the electron to calculate the energy gained in traversing the first part of your diagram and equate this to the kinetic energy to solve for the velocity as you leave the slit in the vertical anode

1/2 mv^2=eV
 
Last edited:
Ty what do I do after?
 
i have the initial velocity what do i solve for next? ε, acceleration, Fe, final velocity? how to find potential difference
 
Last edited:
never mind i got it.
 

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