Two point charges are placed in the -plane: at and at

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two point charges are placed in the

xy

-plane:

\displaystyle q_{1}= +2.0\,\mu\text{C}

(2.0\,\text{cm},\,-3.0\,\text{cm},\,0)

and

q_{2}= -1.0\,\mu\text{C}

(-1.0\,\text{cm},\,4.0\,\text{cm},\,0)

. Take

k=9.0\times10^{9}\,\text{N m}^{2}\text{/C}^{2}

. (a) Write the position vectors of the two charges with respect to the origin. (b) Determine the displacement vector from

q_{2}

q_{1}

. (c) Find the unit vector along this displacement. (d) Calculate the electrostatic force (vector form and magnitude) exerted on

q_{2}

q_{1}