Neco Model Questions Vol1 2019 Physics Question 32

Practice objective / multiple choice question 32 from the 2019 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 32 NECO_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

Two point charges are fixed on the \(x\)-axis: a \(+8\,\mu\text{C}\) charge at the origin and a \(-12\,\mu\text{C}\) charge at \(x = 0.30\,\text{m}\). A small test charge of \(+1\,\mu\text{C}\) is to be placed on the line joining them where the net electric field is zero.\n(a) Find the distance of this point from the \(+8\,\mu\text{C}\) charge.\n(b) The test charge is then moved slowly to a point \(0.10\,\text{m}\) to the right of the \(-12\,\mu\text{C}\) charge. Calculate the work done by an external agent in this movement. (Take \(k = 9\times10^{9}\,\text{N·m}^{2}\!\!/\text{C}^{2}\).)

Answer Options

A. -0.90
B. -1.10
Correct Answer C. -0.78
D. -0.65
Correct Answer
C
Correct Option:
-0.78

About This Question

This is Neco Model Questions Vol1 2019 Physics Question 32. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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