Gce Model Questions Vol1 2018 Physics Question 30

Practice objective / multiple choice question 30 from the 2018 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2018 Physics Objective / Multiple Choice Hard Difficulty
Question 30 GCE_MODEL_QUESTIONS_VOL1 • 2018 • PHYSICS • objective

Two point charges are fixed in space: \(q_1 = +8\ \text{nC}\) at the origin and \(q_2 = -2\ \text{nC}\) at \((0,0,0.10\ \text{m})\). A test charge \(q = +1\ \mu\text{C}\) is moved quasistatically from point \(A\;(0.05\ \text{m},0,0)\) to point \(B\;(0,0.05\ \text{m},0)\) along a straight line. (a) Determine the magnitude and direction of the net electric field at point \(A\). (b) Calculate the work that must be done by an external agent to move the test charge from \(A\) to \(B\) against the electric field.

Answer Options

A. E ≈ 2.50×10⁴ N C⁻¹ directed 1.2° above +x; work ≈ 3.8×10⁻⁴ J
B. E ≈ 2.81×10⁴ N C⁻¹ directed 2.6° below +x; work ≈ 4.2×10⁻⁴ J
Correct Answer C. E ≈ 2.81×10⁴ N C⁻¹ directed 2.6° above +x; work ≈ 4.2×10⁻⁴ J
D. E ≈ 3.10×10⁴ N C⁻¹ directed 5.0° above +x; work ≈ 5.0×10⁻⁴ J
Correct Answer
C
Correct Option:
E ≈ 2.81×10⁴ N C⁻¹ directed 2.6° above +x; work ≈ 4.2×10⁻⁴ J

About This Question

This is Gce Model Questions Vol1 2018 Physics Question 30. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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