A square of side ?a? has charge Q at its centre and charge ?q? at one of the corners. The work required to be done in moving the charge ?q? from the corner to the diagonally opposite corner is [UPSEAT 2004]

\[\frac{Qq}{4\pi {{\in }_{0}}a}\]

\[\frac{Qq}{2\pi {{\in }_{0}}a}\]

A square of side ?a? has charge Q at its centre and charge ?q? at one

1.	A square of side ?a? has charge Q at its centre and charge ?q? at one of the corners. The work required to be done in moving the charge ?q? from the corner to the diagonally opposite corner is [UPSEAT 2004]
A.	Zero
B.	\[\frac{Qq}{4\pi {{\in }_{0}}a}\]
C.
D.	\[\frac{Qq}{2\pi {{\in }_{0}}a}\]
Answer» B. \[\frac{Qq}{4\pi {{\in }_{0}}a}\]

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A square of side ?a? has charge Q at its centre and charge ?q? at one of the corners. The work required to be done in moving the charge ?q? from the corner to the diagonally opposite corner is [UPSEAT 2004]

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