Per NCERT §1.2, the unit of SOLID ANGLE in SI is which?
ASquare radian
BRadian (rad)
CSteradian (sr)
DLumen (lm)
Answer & Solution
Correct answer: C. Steradian (sr)
NCERT §1.2 Fig 1.1(b): solid angle = area/radius² → sr. Dimensionless, supplementary SI unit.
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