Gce Model Questions Vol1 2019 Physics Question 46

Practice objective / multiple choice question 46 from the 2019 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 46 GCE_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • objective

Two point charges are placed on the x‑axis: a charge +Q at the origin and a charge -2Q at x = d. A uniform electric field of magnitude \(E_{0}\) acts vertically upward (positive y‑direction). Determine the point on the x‑axis where the magnitude of the resultant electric field is a minimum and give its distance from the origin in terms of \(d\).

Answer Options

A. The minimum occurs at \(x = -d\); the distance from the origin is \(d\) to the left.
Correct Answer B. The minimum occurs at \(x = -d(\sqrt{2}+1)\); the distance from the origin is \(d(\sqrt{2}+1)\) to the left.
C. The minimum occurs at \(x = -2d\); the distance from the origin is \(2d\) to the left.
D. The minimum occurs at \(x = -d(\sqrt{2}-1)\); the distance from the origin is \(d(\sqrt{2}-1)\) to the left.
Correct Answer
B
Correct Option:
The minimum occurs at \(x = -d(\sqrt{2}+1)\); the distance from the origin is \(d(\sqrt{2}+1)\) to the left.

About This Question

This is Gce Model Questions Vol1 2019 Physics Question 46. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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