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  4. A long cylindrical shell carries positive surface charge σ in the upper half and negative surface charge -σ in the lower half. The electric field lines around the cylinder will look like figure given in: (figures are schematic and not drawn to scale)

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Q. A long cylindrical shell carries positive surface charge $\sigma$ in the upper half and negative surface charge $-\sigma$ in the lower half. The electric field lines around the cylinder will look like figure given in:
(figures are schematic and not drawn to scale)

JEE MainJEE Main 2015Electric Charges and Fields

Solution:

Tangent to the electrical field lines will give us the direction at a given point.