. Four charges Q1, Q2, Q3 and Q4 of same magnitude are fixed along the x axis at


Four charges Q1, Q2, Q3 and Q4 of same magnitude are fixed along the x axis at
x = −2a, −a, +a and +2a, respectively. A positive charge q is placed on the positive y axis at a distance b > 0. Four options of the signs of these charges are given in List I. The direction of the forces on the charge q is given in List II. Match List I with List II and select the correct answer using the code given below the lists.

Four charges Q1, Q2, Q3

 

Best Answer

Four charges Q1, Q2, Q3

Each dipole pair will cancelled y of each other and x of Q2 − Q3 pair along −ve x is stronger than that of Q1 − Q4 along +ve x.

 

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