Two identical point charges are located at and

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

Two identical point charges

+q

are located at

(3\,\text{cm},0,0)

and

(-3\,\text{cm},0,0)

. Let

\mathbf F_{12}

be the electrostatic force on the charge at

(-3\,\text{cm},0,0)

due to the charge at

(3\,\text{cm},0,0)

, and

\mathbf F_{21}

be the force on the charge at

(3\,\text{cm},0,0)

due to the other. Which statement is correct? (a)

\mathbf F_{12}

and

\mathbf F_{21}

are equal both in magnitude and direction. (b) Both forces are zero because the electric fields produced by the charges cancel each other. (c)

\mathbf F_{12}

and

\mathbf F_{21}

have the same magnitude but opposite directions. (d)

\mathbf F_{12}

is twice

\mathbf F_{21}

in magnitude and along the same direction.