The figure given below shows some equipotential surfaces produced by some charges. The magnitude of electric field is greatest at
A
A
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B
same at all points
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C
B
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D
C
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Solution
The correct option is CB Electric lines of forces are always perpendicular to the equipotential surfaces.
⇒ In the figure, it can be observed that near point B the equipotential surfaces are closely spaced.
Therefore, electric filed lines will be closest at point B and we know that closest electric lines have higher strength.
⇒EB>EC>EA
∴ electric field magnitude is greatest at point B.
Tip: In such problems, the key is to observe the spacing of equipotential surfaces.