Electric field - Finding the charges

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SUMMARY

The discussion centers on calculating the magnitudes of two point charges, q1 and q2, which are separated by 4.00 cm and influence an electron placed equidistantly between them. The charges are determined to be q1 = 5.97x10-6 C and q2 = -5.97x10-6 C, based on the electron's initial acceleration of 8.05×1018 m/s2 directed upward. The relevant equations used in the analysis include E = k(q/r2) and F = k(q/r2), which relate electric field and force to charge and distance.

PREREQUISITES
  • Understanding of Coulomb's Law and electric fields
  • Familiarity with the concepts of force and acceleration in physics
  • Knowledge of basic electrostatics, including point charges
  • Ability to manipulate scientific notation and units in calculations
NEXT STEPS
  • Study the derivation of Coulomb's Law and its applications
  • Learn about electric field lines and their representation
  • Explore the concept of superposition of electric fields from multiple charges
  • Investigate the motion of charged particles in electric fields
USEFUL FOR

Students studying electromagnetism, physics educators, and anyone interested in understanding the behavior of charged particles in electric fields.

rm_girl
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Homework Statement


Two point charges q1 and q2 are held 4.00cm apart. An electron released at a point that is equidistant from both charges, undergoes an initial acceleration of 8.05×1018m/s2 directly upward in the figure, parallel to the line connecting q1 and q2.

bhgg7a.png


Homework Equations


E=k(q/r2)
F=k(q/r2)
E=F/q


The Attempt at a Solution


I already know what the answers are.
q1 = 5.97x10-6 C
q2 = -5.97x10-6 C

I just have no idea how they got those answers. Could someone please explain?
 
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rm_girl said:

Homework Statement


Two point charges q1 and q2 are held 4.00cm apart. An electron released at a point that is equidistant from both charges, undergoes an initial acceleration of 8.05×1018m/s2 directly upward in the figure, parallel to the line connecting q1 and q2.

bhgg7a.png


Homework Equations


E=k(q/r2)
F=k(q/r2)
E=F/q



The Attempt at a Solution


I already know what the answers are.
q1 = 5.97x10-6 C
q2 = -5.97x10-6 C

I just have no idea how they got those answers. Could someone please explain?


Both charges exert some force on the electron. Draw the force vectors. What can you say about their direction?

ehild
 

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