Neco 2021 Physics Question 9
Practice objective / multiple choice question 9 from the 2021 Neco Physics examination.
Three point charges are placed in the xy‑plane: \( Q_{1}=+2\ \mu\text{C} \) at the origin, \( Q_{2}=-3\ \mu\text{C} \) at \((0\ \text{m},\ 4\ \text{m})\), and \( Q_{3}=+4\ \mu\text{C} \) at \((3\ \text{m},\ 0\ \text{m})\). (a) Determine the magnitude (in N C\(^{-1}\)) and direction (angle measured counter‑clockwise from the +x‑axis) of the net electric field at point \( P(1\ \text{m},\ 1\ \text{m}) \). (b) A test charge \( q=+1\ \mu\text{C} \) is moved from \( P \) to point \( Q(2\ \text{m},\ 2\ \text{m}) \) along a straight line. Calculate the work done by an external agent in this movement.
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About This Question
This is Neco 2021 Physics Question 9. It is one of the objective questions from the 2021 Neco Physics examination.
Difficulty level: Hard .
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