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Byju's Answer

Standard VIII

Physics

Causes of Earthquake

Four charges ...

Question

Four charges $Q_{1,} Q_{2,} Q_{3}$ and $Q_{4}$ 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 below the lists.

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. $- y$

Code:
(A) P-3, Q-1, R-4, S-2
(B) P-4, Q-2, R-3, S-1
(C) P-3, Q-1, R-2, S-4
(D) P-4, Q-2, R-1, S-3

(C)

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(D)

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(B)

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(A)

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Solution

The correct option is D (A)

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Similar questions

Q. Four charges

Q_{1}, Q_{2}, Q_{3}

and

Q_{4}

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x = - 2 a, - a, + a a n d + 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 below the lists.

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Q. Two charges

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	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.	$- y$