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Solution


Q.

Plane angle and solid angle have                      [2022]
1 Units but no dimensions  
2 Dimensions but no units  
3 No units and no dimensions  
4 Both units and dimensions  

Ans.

(1)

Plane angle and solid angle have supplementary units. Radian (rad) is the unit of plane angle and steradian (sr) is the unit of solid angle. Plane angle and solid angle are dimensionless quantities.