Electric field and potential of 2 point charges

Click For Summary
SUMMARY

The discussion focuses on determining the points where the electric field and electric potential are zero for a system consisting of a -2 μC charge and a 10 μC charge separated by 15.0 cm. The relevant equations used include E=(kq1/r1^2)+(kq2/r2^2) for electric field and V=kq1/r1 + kq2/r2 for electric potential. The key insight is that the electric fields from the two charges must point in opposite directions for the net electric field to be zero, and a diagram is essential for visualizing the possible locations for these points.

PREREQUISITES
  • Understanding of Coulomb's Law and electric fields
  • Familiarity with electric potential concepts
  • Ability to manipulate algebraic equations
  • Basic skills in drawing and interpreting diagrams
NEXT STEPS
  • Study the principles of electric field directionality in charge systems
  • Learn how to apply the superposition principle in electrostatics
  • Explore graphical methods for visualizing electric fields and potentials
  • Investigate the concept of equipotential surfaces in electrostatics
USEFUL FOR

Students studying electromagnetism, physics educators, and anyone seeking to understand the behavior of electric fields and potentials in systems with multiple charges.

soccerscholar
Messages
7
Reaction score
0

Homework Statement



A -2 μC charge and a 10μC charge are separated by 15.0cm. At what point is the electric field zero? At what point is the electric potential zero?


Homework Equations


E=(kq1/r1^2)+(kq2/r2^2)
V=kq1/r1 + kq2/r2

The Attempt at a Solution


My main problem is with finding the direction in which the negative and positive charges act on the point where the electric field is 0 and where the electric potential is 0. Can someone explain how to figure out the direction that these charges act? For the electric field, how do you know whether the point is between the two charges, or on either side of one of the charges? I think I can figure out the math from there.
 
Physics news on Phys.org
Obviously, The Electric Fields due to the two charges should point in opposite direction for the net E to be zero at that point. You should draw a diagram and see where is/are the possible places.
 
Okay, makes more sense now. Thanks!
 

Similar threads

Electric potential due to shell containing a charge at an offset outside
  • · Replies 5 ·
Replies
5
Views
1K
Struggling With Part C of Electric Field Calculation
  • · Replies 2 ·
Replies
2
Views
2K
Electric field at the center of the equilateral triangle
  • · Replies 10 ·
Replies
10
Views
4K
Direction of electric field vector on the surface of charged conductor
  • · Replies 9 ·
Replies
9
Views
2K
Work done to insert a point charge 𝑞 at the center of a conducting sphere
  • · Replies 12 ·
Replies
12
Views
2K
Capacitors, equipotentials, and electric fields
  • · Replies 5 ·
Replies
5
Views
1K
Electric Potential Energy of Point Charge Systems
  • · Replies 2 ·
Replies
2
Views
1K
Electric Field Inside a Gaussian Surface with Point Charge q
  • · Replies 4 ·
Replies
4
Views
2K
The electric potential inside a conducting sphere with charge Q
  • · Replies 11 ·
Replies
11
Views
2K
Earthing of two parallel conducting plates
  • · Replies 11 ·
Replies
11
Views
2K