JEE Advanced 2014 Paper 2 Physics Q17

Physics · Electric Charges & Fields

Problem

Four charges

Q_1

Q_2

Q_3

and

Q_4

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. Column I — P:

Q_1,Q_2,Q_3,Q_4

all positive; Q:

Q_1,Q_2

positive;

Q_3,Q_4

negative; R:

Q_1,Q_4

positive;

Q_2,Q_3

negative; S:

Q_1,Q_3

positive;

Q_2,Q_4

negative Column Ii — 1:

+x

; 2:

-x

; 3:

+y

; 4:

-y