Why Is the Electric Flux from a Point Charge Only Half Through the XY Plane?

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The electric flux through the x-y plane from a point charge +Q located 1 m below it is Q/2 due to the symmetry of the electric field lines. These lines radiate outward from the charge, with half of them crossing the x-y plane and the other half extending away from it. The arrangement of the field lines indicates that only those lines directed towards the plane contribute to the flux. The discussion emphasizes understanding the geometric distribution of electric field lines in relation to the charge's position. Thus, the total electric flux through the x-y plane is confirmed to be Q/2.
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A point charge +Q is located 1 m below the x-y plane. What is the total electric flux passing through the x-y plane? I know the answer should be Q/2 but how?
 
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Imagine field lines emanating radially from that point charge. Which field lines will cross that plane? Which will never make it to that plane?
 
Hammed said:
A point charge +Q is located 1 m below the x-y plane. What is the total electric flux passing through the x-y plane? I know the answer should be Q/2 but how?
How will the flux lines be arranged around the charge? What symmetry is there?
 
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