Are the concentric magnetic field lines are equally spaced around a straight current carrying
conductor? Explain your answer.
Answers
Answer:
The “magnetic lines of force,” first of all, aren’t really lines. We just use that as a thinking tool to deal with a varying field of force. The lines you see when using iron filings are from the filings gathering together… but the actual field is linear. The lines of force on a diagram are like the lines on a topographic map. They indicate areas of equal charge, or, in the case of a map, equal elevation. That is all.
As for the field around a current-carrying wire, it is a cylinder. It is strongest closest to the wire, and diminishes as you get further out. If you could measure really tiny magnetic fields, you could still measure it across the room. But there are so many other magnetic fields around, including the Earth’s own magnetic field, that you would have to perform that exercise in intergalactic space.