Question

Q. Which of the following statements is correct about magnetic lines of force?

• A. Magnetic lines of force are always closed.
• B. Magnetic lines of force always intersect each other.
• C. Magnetic lines of force tend to crowd far away from the poles of the magnet
• D. Magnetic lines of force do not pass through the vacuum.

Answer 1

The correct option is A Magnetic lines of force are always closed.

Explanation:

Magnetic field lines or magnetic lines of force are always closed curves because they propagate from the North pole outside the magnet's body to the magnet's body and from the south pole to the north pole inside the magnet's body, forming a loop-like structure. Hence, the magnetic field lines are closed.

Characteristics of Field Lines:

• Field lines arise from the north pole and end into the south pole of the magnet.
• They are closed curves.
• Field lines never intersect each other.
• The direction of magnetic field lines inside the magnet is from south to north.