Figure 1 below represents three charges \( Q_{1}=+10 \mu C, Q_{2}=-5 \mu C \) and \( Q_{3}=+5 \mu C \).
i) Draw the directions of the electrical forces acted on charge \( Q_{\text {, due to to charges }} \) \( Q_{1} \) and \( Q_{2} \).
(2 marks)
i) Calculate the magnitude and direction of the resultant electric force acted on charge \( Q_{2} \).
\[
\text { Ans: } 1.15 \mathrm{~N},-59.6^{\circ}
\]