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