Question: Two flat surfaces are near two different charged objects, and the surfaces are identical in size. Surface A has (N) field lines passing perpendicularly through

Two flat surfaces are near two different charged objects, and the surfaces are identical in size. Surface A has $N$ field lines passing perpendicularly through it. Surface B has only $N / 2$ field lines passing through it, and they pass through at an angle $72^{\circ}$ from normal. Is the field line density greater near surface $A$ or surface $B$, and by how much?

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