Question

An overhead power transmission line carries a current from east to west direction. Then magnetic
field at a point 1.5m north of the line is in
(A) North direction
(B) South direction
(C) Vertically upward direction (outside the plane of paper)
(D) Vertically downward direction (inside the plane of paper)

Answer 1

I think B Hope it will be correct

Answer 2

Answer:

(D) Vertically downward direction (inside the plane of paper) is the right answer

Step-by-step explanation:

According to cork-screw rule,

Keeping thumb in the direction of current and twisting the fingers around it, we get, the direction of magnetic field at the north of the line as vertically downward direction [Refer attachment]

Hence, (D) is the right option.

Hope it helps!!