Physics

Problem

Point charges

q_1 = +4\,\mu\text{C}

is kept at the point

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

and

q_2 = -6\,\mu\text{C}

is kept at

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

on the

xy

-plane in vacuum. a. (i) Calculate the electrostatic force

\mathbf{F}_{21}

q_2

due to

q_1

in vector component form. b. (ii) Using your result from part (i), write the force

\mathbf{F}_{12}

q_1

due to

q_2

and state how its direction verifies Newton’s third law. c. (iii) Find the magnitude of the force obtained in part (i).