Please explain the oersted's experiment in detail . why does the magnetic needle deflect when brought near a current carrying conductor? Does it have have a property to deflect when brought near a magnet and how does the noth and the south pole of the magnetic needle deflect the geographic north and south pole being the same ?
- Quickly disconnect (it is not good for the battery to draw such a large current). The needle will swing back to the north-south direction.
- Note that no iron is involved in producing the magnetic effect!
- Repeat with the connections of the battery reversed. Note that the needle now swings 90 degrees in the opposite direction.
- Take a piece of paper 2"x4" (5x10 centimeters) and fold the longer side into pleats, about 3/8" (1 centimeter) high. Put the wire on the table, its middle in the north south direction, put the pleated paper above it so that the wire is below one of the pleats, and place the compass on top of the pleats. (Or else, use a small block of wood, with a groove cut in its bottom for the wire.)
- You can now repeat the experiment with the compass above the wire (if two people perform the experiment, they need no pleats or table--one can old the compass, the other the wire and battery). Note that the needle swings in the opposite direction than when the compass was below the wire.