Gce Model Questions Vol1 2017 Physics Question 10
Practice objective / multiple choice question 10 from the 2017 Gce Model Questions Vol1 Physics examination.
Three point charges are placed at the vertices of an equilateral triangle of side \(a = 0.10\,\text{m}\). The charges are \(q_{A}=+2\,\mu\text{C}\) at vertex A, \(q_{B}=-3\,\mu\text{C}\) at vertex B and \(q_{C}=+5\,\mu\text{C}\) at vertex C. The triangle lies in vacuum.\n\n(i) Determine the magnitude of the resultant electric field at the centre O of the triangle (in N\,C^{-1}, to two significant figures) and state its direction as an angle measured clockwise from the positive x‑axis.\n\n(ii) A test charge of \(+1\,\mu\text{C}\) is brought from infinity to the centre O. Calculate the work done on the test charge (in joules, to two significant figures).
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About This Question
This is Gce Model Questions Vol1 2017 Physics Question 10. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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