Magnetic Field Lines — PropertiesEasyQuestion 20222
Question
Which property is TRUE about magnetic field lines?
- AThey start and end on charges
- BThey form closed loops and never intersectCorrect
- CThey can cross each other
- DThey start from south poles
Correct answer
They form closed loops and never intersect
Explanation
Magnetic monopoles don't exist — field lines always close on themselves (they emerge from N, re-enter at S externally, and continue N→S inside the magnet). Two field lines never cross (that would imply two directions at one point).