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JEE Advance - Physics (2014 - Paper 2 Offline - No. 18)

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.

JEE Advanced 2014 Paper 2 Offline Physics - Electrostatics Question 24 English

List I List II
P. Q$$_1$$, Q$$_2$$, Q$$_3$$, Q$$_4$$ all positive 1. +x
Q. Q$$_1$$, Q$$_2$$ positive; Q$$_3$$, Q$$_4$$ negative 2. $$ - $$x
R. Q$$_1$$, Q$$_4$$ positive; Q$$_2$$, Q$$_3$$ negative 3. +y
S. Q$$_1$$, Q$$_3$$ positive; Q$$_2$$, Q$$_4$$ negative 4. $$ - $$y

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

Explanation

(P) Component of forces along x-axis will vanish. Net force along positive y-axis.

JEE Advanced 2014 Paper 2 Offline Physics - Electrostatics Question 24 English Explanation 1

(Q) Component of forces along y-axis will vanish. Net force along positive x-axis

JEE Advanced 2014 Paper 2 Offline Physics - Electrostatics Question 24 English Explanation 2

(R) Component of forces along x-axis will vanish. Net force along negative y-axis.

JEE Advanced 2014 Paper 2 Offline Physics - Electrostatics Question 24 English Explanation 3

(S) Component of forces along y-axis will vanish. Net force along negative x-axis

JEE Advanced 2014 Paper 2 Offline Physics - Electrostatics Question 24 English Explanation 4

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