As per this diagram a point charge \[+q\] is placed at the origin \[O\]. Work done in taking another point charge \[-Q\] from the point \[A\] [co-ordinates \[(0,\,a)\]] to another point B [co-ordinates (a, 0)] along the straight path \[AB\] is [CBSE PMT 2005]

\[\left( \frac{-qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\,\sqrt{2}a\]

Acute (Less than \[90{}^\circ \])

\[\left( \frac{qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\,\sqrt{2}a\]

As per this diagram a point charge \[+q\] is placed at the origin \[O\

1.	As per this diagram a point charge \[+q\] is placed at the origin \[O\]. Work done in taking another point charge \[-Q\] from the point \[A\] [co-ordinates \[(0,\,a)\]] to another point B [co-ordinates (a, 0)] along the straight path \[AB\] is [CBSE PMT 2005]
A.	Zero
B.	\[\left( \frac{-qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\,\sqrt{2}a\]
C.	Acute (Less than \[90{}^\circ \])
D.	\[\left( \frac{qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\,\sqrt{2}a\]
Answer» B. \[\left( \frac{-qQ}{4\pi {{\varepsilon }_{0}}}\frac{1}{{{a}^{2}}} \right)\,\sqrt{2}a\]

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As per this diagram a point charge \[+q\] is placed at the origin \[O\]. Work done in taking another point charge \[-Q\] from the point \[A\] [co-ordinates \[(0,\,a)\]] to another point B [co-ordinates (a, 0)] along the straight path \[AB\] is [CBSE PMT 2005]

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