Is force, which we show, right on test charge

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Discussion Overview

The discussion revolves around the concept of electric field lines and the resultant forces acting on a test charge placed in the vicinity of two equal magnitude and same nature charges. Participants explore the implications of electric field lines and how forces are calculated in this context.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether it is correct to consider the force exerted by a second charge on a test charge when the electric field lines from that charge do not cross the line bisecting the two charges.
  • Another participant requests a diagram to clarify the situation being discussed, suggesting a visual representation may help in understanding the forces involved.
  • A participant acknowledges their understanding of the problem, indicating they are aware of the implications of placing the test charge incorrectly.
  • There is a reiteration that the resultant force on the test charge is derived from the sum of the forces due to each charge individually, emphasizing the linear nature of electric fields.

Areas of Agreement / Disagreement

Participants express differing views on the implications of electric field lines and the resultant forces. There is no consensus on the correctness of the initial claim regarding the test charge and the forces acting on it.

Contextual Notes

Participants reference diagrams and external links to clarify their points, but there is no resolution on the assumptions regarding the placement of the test charge and the resulting forces.

rahaverhma
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As we draw the electric field lines due to 2 equal magnitude and same nature charges. But when we solve the question concerning the same case we take the resultant of forces due to both charges at a test charge in such a manner that the 2nd charge(let I put the test charge on the left side i.e. the region of 1st charge) is also exerting the force but it can't because the electric field line due to that charge actually never crossed the margin bisecting the line joining the 2 charges. Is it right?
 
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rahaverhma said:
As we draw the electric field lines due to 2 equal magnitude and same nature charges. But when we solve the question concerning the same case we take the resultant of forces due to both charges at a test charge in such a manner that the 2nd charge(let I put the test charge on the left side i.e. the region of 1st charge) is also exerting the force but it can't because the electric field line due to that charge actually never crossed the margin bisecting the line joining the 2 charges. Is it right?
Could you please post a diagram of the situation you are asking about? Is it something like this?

https://image.slidesharecdn.com/ele...1/95/electric-fields-11-728.jpg?cb=1237897460
electric-fields-11-728.jpg
 

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What line? What does your diagram look like? You can use the UPLOAD button in the lower right of the Reply box to Upload a PDF or JPEG of your diagram...
 
rahaverhma said:
Yes, sir. But I'm not putting test charge on the line because I know there I will be wrong . :cry::biggrin:
Sorry, I don't know
 
rahaverhma said:
when we solve the question concerning the same case we take the resultant of forces due to both charges at a test charge
Yes, that is always the case. The field and therefore the force is linear, meaning that the force due to both charges is the sum of the forces due to each charge individually.
 

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