BPSC – Combined Competitive Examination · Question 27
Current density is:
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Answer: (B) a vector quantity
Explanation
Current density J = I/A points in the direction of positive charge flow, so it is a vector.
- (A) Incorrect
Wrong: current is scalar, but current density has direction.
- (B) Correct
Correct: current density J has magnitude and direction (A/m²).
- (C) Incorrect
Wrong: it has units of A/m².
- (D) Incorrect
Wrong: it is a vector.