WAEC Physics 2018 Objective — Question 9
Question 9 of 50 from the West African Examinations Council (WAEC) Physics 2018 Objective paper, with the correct answer and a full explanation.
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Which of the following quantities are dimensionally independent (dimensionless)? I. dielectric constant II. Momentum constant III. Efficiency IV. Refractive index
- A. I and II
- B. I, II, III and IVCorrect
- C. II, III and IV
- D. I, III and IV
Explanation
Dielectric constant, momentum constant, efficiency and refractive index are all expressed as ratios of like quantities, so all four are dimensionless.
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