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Explain why two field lines never cross each other at any point?

Q 1.7 (b): Explain why two field lines never cross each other at any point?

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A tangent drawn at any point on a field line gives the direction of force experienced by a unit positive charge due to the electric field on that point. If two lines intersect at a point, then the tangent drawn there will give two directions of force, which is not possible. Hence two field lines cannot cross each other at any point.

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