For two equal positive charges, the electric field is weakest:
Correct answer: A. Midway between them
- A. Midway between them
- B. Along the perpendicular bisector
- C. Close to either charge
- D. At infinity
Explanation
At the midpoint the two fields are equal in magnitude and opposite in direction, so they cancel exactly and the resultant is zero, which is the weakest the field can be anywhere at finite distance. Close to either charge the field is strongest. The field also tends to zero at infinity, but the question is asking for the null point produced by the pair.
This question appeared on the UHS MDCAT 2025 paper, which you can sit online with every answer explained.
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About Electric Field Intensity
Electric field intensity is the force acting per unit positive test charge, with direction set by the force on that charge. Work includes fields of point charges, vector superposition, field lines and the relation between field and electric potential. Field intensity must be distinguished from electric force and potential.
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