Electric Field Lines: Does Positive Test Charge Follow?

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SUMMARY

A positive test charge does not follow electric field lines directly; instead, it experiences a force at its current position due to the electric field vector. As the charge moves, it continuously feels a new force at each updated position. For instance, in a parallel plate capacitor, while the electric field lines are perpendicular to the plates and uniform, a charged particle with an initial velocity parallel to the plates will follow a parabolic trajectory rather than a straight line.

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Mausam
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Does a positive test charge follows along the path of electric field lines if it is free to do so? I mean the trajectory of the charge is along the electric field lines and the field lines are not necessarily straight.
 
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Mausam said:
Does a positive test charge follows along the path of electric field lines if it is free to do so? I mean the trajectory of the charge is along the electric field lines and the field lines are not necessarily straight.
No. The positive test charge feels a force due to the field vector at that point. The charge's position gets updated and then feels another force at the new point, and so on.

Example... given a parallel plate capacitor, the field lines between the plates are perpendicular to the plates and the field strength is constant.
If a charged particle between the plates has a velocity initially parallel to the plate, that particle will follow a parabolic path.
 
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