Question
A charged particle $$q$$ is placed at the centre $$O$$ of cube of length $$L\left( {ABCDEFGH} \right).$$ Another same charge $$q$$ is placed at a distance $$L$$ from $$O.$$ Then the electric flux through $$ABCD$$ is
A charged particle $$q$$ is placed at the centre $$O$$ of cube of length $$L\left( {ABCDEFGH} \right).$$ Another same charge $$q$$ is placed at a distance $$L$$ from $$O.$$ Then the electric flux through $$ABCD$$ is
A.
$$\frac{q}{4}\pi { \in _0}L$$
B.
zero
C.
$$\frac{q}{2}\pi { \in _0}L$$
D.
$$\frac{q}{3}\pi { \in _0}L$$
Answer :
zero
Solution :
Both the charges are identical and placed symmetrically about $$ABCD.$$ The flux crossing $$ABCD$$ due to each charge is $$\frac{1}{6}\left[ {\frac{q}{{{ \in _0}}}} \right]$$ but in opposite directions. Therefore the resultant is zero.
Both the charges are identical and placed symmetrically about $$ABCD.$$ The flux crossing $$ABCD$$ due to each charge is $$\frac{1}{6}\left[ {\frac{q}{{{ \in _0}}}} \right]$$ but in opposite directions. Therefore the resultant is zero.
