Physics · UNITS AND MEASUREMENT
हिन्दीAs shown in the figure, plane angle \( d\theta \) is defined as the ratio of the length of arc \( ds \) to the radius \( r \). What is the SI unit for this plane angle?
Correct answer · Option 2
radian (rad)
Explanation
The unit for plane angle is radian with the symbol rad, which is a dimensionless quantity.