Q: Imagine a current-carrying straight conductor with magnetic field of lines in anti-clockwise direction. Then the direction of current is determined by
(a)the Right-Hand Thumb rule and it would be in the downward direction.
(b)the Left-Hand Thumb rule and it would be in the downward direction.
(c)the Right-Hand Thumb rule and it would be in the upward direction.
(d)the Left-Hand Thumb rule and it would be in the upward direction.
Correct Answer: (c)