JEE Main & Advanced
Physics
Electrostatics & Capacitance
Question Bank
Electric Field and Potential
question_answer
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) \[\frac{Qq\sqrt{2}}{4\pi {{\in }_{0}}a}\]
D) \[\frac{Qq}{2\pi {{\in }_{0}}a}\]
Correct Answer:
A
Solution :
From symmetry of the figure all corner have same electric potential. Therefore work done in moving the charge q from the corner to the diagonally opposite corner is zero.