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Electric Charges And Fields

Question

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A charged particle q is placed at the centre O of a cube of length L (ABCDEFGH). Another same charge q is placed at a distance L from O. Than the electric flux through ABCD is

$\frac{q}{4 {πε}_{0} L}$
Zero
$\frac{q}{2 {πε}_{0} L}$
$\frac{q}{3 {πε}_{0} L}$

Solution

D.

\frac{q}{3 {πε}_{0} L}

Some More Questions From Electric Charges and Fields Chapter

a) An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not?
b) Explain why two field lines never cross each other at any point?

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