Question
The figure shows a nonconducting ring which has positive and negative charge non uniformly distributed on it such that the total charge is zero. Which of the following statements is true?
✓
Answer
By symmetry potential due to negative part $=$(potential due to particle part). (Also every small charge is equidistant from axis)
$\therefore$ Potential at all potential axis is zero
Direction of field is perpendicular to axis and towards negative side
There will be a torque when placed in uniform field
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