Four charges are arranged at the corners of a square A B C D as shown in the figure. The force on the positive charge kept at the centre O is

Question

Four charges are arranged at the corners of a square A B C D as shown in the figure. The force on the positive charge kept at the centre O is (A) zero (B) along the diagonal AC (C) along the diagonal BD (D) perpendicular to side AB

Tardigrade Admin · Accepted Answer

Magnitude as well as polarities of charges at points A and C are same. Therefore forces at O, due to these charges cancel each other. Moreover, polarities of the charges at B and D are opposite; therefore force on charge kept at the centre is along the diagonal B D.

Q. Four charges are arranged at the corners of a square $A BC D$ as shown in the figure. The force on the positive charge kept at the centre $O$ is

zero

along the diagonal AC

along the diagonal BD

perpendicular to side AB

Magnitude as well as polarities of charges at points $A$ and $C$ are same. Therefore forces at $O$ , due to these charges cancel each other. Moreover, polarities of the charges at $B$ and $D$ are opposite; therefore force on charge kept at the centre is along the diagonal $B D$ .

Q. Four charges are arranged at the corners of a square ABCD as shown in the figure. The force on the positive charge kept at the centre O is