00:01
Yeah, so hello everyone.
00:02
In the question we have given mu is equals to nia.
00:06
Now, mu is in direction perpendicular to area and inwards.
00:31
That is into the page.
00:37
Now, we have given value of v which is equals to its direction, which is upward or in j -cap direction.
00:49
Direction of mu, which is in minus of k -cap direction.
00:53
Now, tau is equal to mu cross b.
01:01
So, taking cross product of direction as well, minus k cap cross j cap, which is equals to i cap.
01:12
This means to the right...