If you hold a bar magnet in each hand and bring your hands together, will the force be attractive or repulsive if the magnets arte held so that
A) the tow north poles are brought close together?
B) a north pole and a south pole are brought together?
Like poles repel, unlike attract.
The term North pole, or South pole, is a very misleading and confusing term, to be avoided. Check your text on that. Most use the term N-pole, or S-pole, which means North seeking pole, or South seeking pole. Those are much more meaningful terms.
A) If you hold two bar magnets in each hand and bring your hands together with the two north poles close together, the force between them will be repulsive. This is because like poles (both north or both south) of magnets repel each other.
B) If you bring a north pole and a south pole together, the force between them will be attractive. This is because opposite poles (north and south) of magnets attract each other.
A) If two north poles of the bar magnets are brought close together, the force between them will be repulsive. To understand this phenomenon, you can use the Right Hand Rule, commonly known as the "thumb rule." Imagine placing your right hand on one of the magnets, with your thumb pointing in the direction of the magnetic field. In this case, the magnetic field would point from the north pole to the south pole of the magnet. Now, if you bring the north pole of another magnet towards the already placed north pole, the magnetic fields will oppose each other. According to the Right Hand Rule, when two magnetic field lines or forces oppose each other, they create a repulsive force.
B) If a north pole and a south pole are brought together, the force between them will be attractive. Again, you can apply the Right Hand Rule to visualize this. Place your right hand on one of the magnets, with your thumb pointing in the direction of the magnetic field. This time, the field would point from the north pole to the south pole of the magnet. If you bring the south pole of another magnet towards the already placed north pole, the magnetic fields will align, resulting in an attractive force. The magnetic field lines will connect from the north pole to the south pole, creating an attractive force between the two magnets.
In both cases, understanding the concept of magnetic field lines and using the Right Hand Rule can help determine the type of force (attractive or repulsive) that occurs when bringing the magnets together.