In summary, the conversation discusses the concept of magnetic field lines and how a bar magnet's north and south poles interact with them. It is explained that the north pole of a bar magnet will align with the direction of the field lines, while the south pole will align in the opposite direction. The conversation also clarifies that the question is asking about the alignment of the field lines with a magnet, with the correct answer being the north pole.
Take a bar magnet. Magnetic lines of force come out of the North Pole of the magnet, then go around and back into South Pole. Think about how field lines interact. If the wire does not move, how would a magnet react to these field lines? Which way would a North end move? How about a South end?
Imagine a magnetic compass needle initially aligned in the radial direction. It will experience a torque and line up with the local field line.
Q1: Is the south-north direction the same or opposite to the local field line?
Q2: What kind of force must act on the north pole so that the needle achieves this orientation?
On edit:@scottdave beat me to it by essentially asking the same questions.
If you place a small bar magnet at each position on the field lines, the north pole will experience a force which will turn it along the direction of the arrows.
North pole - will point along the arrows
South pole - will point opposite to the arrows.
If you place a small bar magnet at each position on the field lines, the north pole will experience a force which will turn it along the direction of the arrows.
North pole - will point along the arrows
South pole - will point opposite to the arrows.
Hence your answer is North pole.
So the question is actually asking how the field lines align with a magnet.
Therefore North
Okey
Thank you very much guys
