Waec Model Questions Vol1 2021 Physics Question 9

Practice objective / multiple choice question 9 from the 2021 Waec Model Questions Vol1 Physics examination.

Waec Model Questions Vol1 2021 Physics Objective / Multiple Choice Hard Difficulty
Question 9 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • PHYSICS • objective

Two point charges are placed on the y‑axis: a +8 µC charge at the origin O and a -2 µC charge at point A (0, 0.12 m). (a) Determine the magnitude and direction of the net electric field at point P (0.08 m, 0). (b) A test charge of +1 µC is moved from P to point Q (0, 0.20 m) along a straight line. Calculate the work done by the electric field on the test charge during this displacement. (c) Find the electric potential difference V_P - V_Q.

Answer Options

A. E ≈ 1.15×10⁷ N C⁻¹ at 2.1° above +x; work = 0.72 J; V_P‑V_Q = 6.90×10⁵ V
B. E ≈ 9.5×10⁶ N C⁻¹ at 5.2° above +x; work = 0.55 J; V_P‑V_Q = 5.80×10⁵ V
Correct Answer C. E ≈ 1.08×10⁷ N C⁻¹ at 3.8° above +x; work = 0.64 J; V_P‑V_Q = 6.40×10⁵ V
D. E ≈ 1.02×10⁷ N C⁻¹ at 4.5° above +x; work = 0.60 J; V_P‑V_Q = 6.20×10⁵ V
Correct Answer
C
Correct Option:
E ≈ 1.08×10⁷ N C⁻¹ at 3.8° above +x; work = 0.64 J; V_P‑V_Q = 6.40×10⁵ V

About This Question

This is Waec Model Questions Vol1 2021 Physics Question 9. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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