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NEETPhysicsElectrostatics

Four charges (Q₁, Q₂, Q₃ ) and (Q₄ ) of same magnitude are fixed along the x axis at ( x =-2 a ), (- a ,+ a ) and +2 a , 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 b

Options

  1. AP-3, Q-1, R-4, S-2
  2. BP-4, Q-2, R-3, S-1
  3. CP-3, Q-1, R-2, S-4
  4. DP-4, Q-2, R-1, S-3

Correct answer

A. P-3, Q-1, R-4, S-2

Step-by-step solution

1. For List-1 (P: Q1, Q2, Q3, Q4 all positive): - All charges are positive, and q is also positive. - The force from Q1 and Q4 will point in the (-x ) direction because they are farther away and will pull q towards the negative x -axis. - The force from Q2 and Q3 will be balanced along the x-axis, but both will pull q downwards in the -y direction. - Net force direction: -y (List-II: 4). 2. For List-1 (Q: Q1, Q2 positive, Q3, Q4 negative): - Q1 and Q2 (positive) will repel q in the (+x ) and (-y ) directions. - Q3

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