An arc of length equal to the circumference of a circle subtends an angle
Correct answer: B. 2 π radian
- A. π radian
- B. 2 π radian
- C. π /2 radian
- D. 4 π radian
Explanation
This option is correct. As explained above, an entire circle's circumference covers 2π radians at the center.
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About Angular Displacement
Angular displacement measures the change in a body’s angular position and is expressed in radians or degrees, with anticlockwise and clockwise directions assigned signs. It connects to arc length, angular velocity and angular acceleration, and must be distinguished from ordinary linear displacement in rotational motion.
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