Four electric charges + q , + q , − q and − q are placed at the corners of a square of side 2 L (see figure). The electric potential at point A , mid-way between the two charges + q and + q , is NEET

Question

Four electric charges + q , + q , − q and − q are placed at the corners of a square of side 2 L (see figure). The electric potential at point A , mid-way between the two charges + q and + q , is NEET 2011 (Screening)

TestHub · Accepted Answer

V = 4 π ε 0 ​ 1 ​ r q ​ Here, ​ V = 2 V + ve ​ + 2 V -ve ​ V = 4 π ε 0 ​ 1 ​ [ L 2 q ​ − L 5 ​ 2 q ​ ] V = 4 π ε 0 ​ L 2 q ​ ( 1 − 5 ​ 1 ​ ) ​

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