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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 37 of 200

Q37
General SciencePhysics
Which of the following is a vector quantity?
  1. a.Current
  2. b.Current density
  3. c.Power
  4. d.Wattless current

Answer: (B) Current density

Current density $\vec{J}$ (current per unit area) has a direction at each point and is a vector. Electric current, though it has a sense of flow, does not obey vector addition and is a scalar; power and wattless current are also scalars.

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Which of the following is a vector quantity? — WBCS Main Examination 2023 Q37 | Prostuti360°