jee-main 2009 Q17

jee-main · India Not Maths

A charge $Q$ is placed at each of the opposite corners of a square. A charge $q$ is placed at each of the other two corners. If the net electrical force on $Q$ is zero, then the $Q/q$ equals
(1) $- 2 \sqrt { 2 }$
(2) $- 1$
(3) $1$
(4) $- \frac { 1 } { \sqrt { 2 } }$

A charge $Q$ is placed at each of the opposite corners of a square. A charge $q$ is placed at each of the other two corners. If the net electrical force on $Q$ is zero, then the $Q/q$ equals\\
(1) $- 2 \sqrt { 2 }$\\
(2) $- 1$\\
(3) $1$\\
(4) $- \frac { 1 } { \sqrt { 2 } }$

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