alleryLinear charge density λ has SI units:
AC/m² (coulomb per square metre)
BC/m (coulomb per metre)
CC/m³ (coulomb per cubic metre)
DC (coulomb)
Answer & Solution
Correct answer: B. C/m (coulomb per metre)
**λ = charge per unit length → C/m**.
Surface density σ = C/m².
Volume density ρ = C/m³.
Each definition matches the dimension of the geometric element it's integrated over.
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