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. List I List II (P) Q1, Q2, Q3, Q4 all positive (1) +x (Q) Q1, Q2 positive; Q3, Q4 negative (2) –x (R) Q1, Q4 positive; Q2, Q3 negative (3) +y (S) Q1, Q3 positive; Q2, Q4 negative (4)

Engineering

Physics

Charge and Coulombs Law

Question

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.

List I	List II
(P) Q₁, Q₂, Q₃, Q₄ all positive	(1) +x
(Q) Q₁, Q₂ positive; Q₃, Q₄ negative	(2) –x
(R) Q₁, Q₄ positive; Q₂, Q₃ negative	(3) +y
(S) Q₁, Q₃ positive; Q₂, Q₄ negative	(4) –y