Question

Which of the following is NOT a property of magnetic field lines?

• A. The relative strength of magnetic field is shown by the degree of closeness of magnetic field lines
• B. Magnetic field lines move from north to south inside a magnet
• C. Magnetic field lines can never cross each other
• D. Magnetic field lines form closed loops

Answer 1

The correct option is B

Magnetic field lines move from north to south inside a magnet

Magnetic field lines form closed loop.

They start at north pole (remember those arrows that show their direction), then turn around the bar magnet and enter the south pole. They move inside the magnet from south to north. Hence correct answer is b.-The arrows on these lines tell the direction of magnetic fields. No two field lines are found to cross each other. If they did, it would mean that at that point of interaction, the compass needle would point towards two directions, which is not possible. -Also the closer they are stronger is the field.