If the resultant external torque acting on a body is zero, then angular momentum of the body

Options

A. Equal in direction
B. Equal in magnitude
C. Both (a) and (b)
D. Neither (a) nor (b)

Answer

C

Explanation

`tau= (d vec(L))/(dt) rArr (d vec(L))/(dt) = 0 rArr vec(L)`= constant