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Asked in RS Academy GUJCET booklet · Relation between field and potential
Idea: Eₓ = -(dV)/(dx), so the magnitude of the field is the steepness (slope) of the V–x graph, whatever the value of V itself.
Region A: V rises gently — a moderate slope.
Region B: V is constant — zero slope, so E = 0.
Region C: V drops sharply over a short distance — the steepest slope.
Region D: V rises steadily over a long stretch — a small slope.
So the field is strongest in region C (there it points along +x, since V falls as x increases).
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