Neco Model Questions Vol1 2017 Physics Question 25

Practice objective / multiple choice question 25 from the 2017 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2017 Physics Objective / Multiple Choice Hard Difficulty
Question 25 NECO_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • objective

Two point charges are placed on the vertical \(y\)-axis. A charge \(+Q\) is at the origin and a charge \(-2Q\) is at \((0, a)\) where \(a = 0.10\,\text{m}\) and \(|Q| = 5.0\,\mu\text{C}\). Determine the point(s) on the \(x\)-axis where the electric potential is zero. Then calculate the magnitude of the electric field at that point. Use \(k = 8.99\times10^{9}\,\text{N·m}^2\text{C}^{-2}\).

Answer Options

A. x = 1.2×10⁻¹ m; |E| ≈ 6.0×10⁶ N·C⁻¹ (directed 45° above +x)
Correct Answer B. x = 5.8×10⁻² m; |E| ≈ 1.2×10⁷ N·C⁻¹ (directed 30° above +x)
C. x = -5.8×10⁻² m; |E| ≈ 1.2×10⁷ N·C⁻¹ (directed 30° below +x)
D. x = 3.9×10⁻² m; |E| ≈ 2.4×10⁷ N·C⁻¹ (directed 15° above +x)
Correct Answer
B
Correct Option:
x = 5.8×10⁻² m; |E| ≈ 1.2×10⁷ N·C⁻¹ (directed 30° above +x)

About This Question

This is Neco Model Questions Vol1 2017 Physics Question 25. It is one of the objective questions from the 2017 Neco Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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