State the direction of magnetic field lines (a) outside a bar magnet, and (b) inside a bar magnet. How does t…

Question

State the direction of magnetic field lines (a) outside a bar magnet, and (b) inside a bar magnet. How does this make the field lines form closed loops?

Accepted Answer

## Model Answer (a) Outside: from North pole to South pole. (b) Inside: from South pole to North pole. This continuous direction makes the field lines form closed loops. ## Explanation The key fact from the textbook is that field lines emerge from the North pole, merge at the South pole (outside), and travel from South to North **inside** the magnet — this unbroken path is what makes them closed curves. Examiners expect both directions stated clearly and a one-line reason for closed loops. Source: Chapter 12, Section 12.1 (Magnetic Field and Field Lines)

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