Question

2 if the magnet in source 1 is reversed so the red end points towards the camera, what pattern will the iron filings make on the glass?
3 examine source 2. then, fill in the blanks to complete the sentences.

Explanation:

Magnetic field lines show the direction of the magnetic force. A bar magnet has two poles (north and south). When the magnet is reversed, the magnetic field pattern (shown by iron filings) still forms around the magnet, with field lines emerging from one pole and entering the other. Option A shows a symmetrical pattern around the magnet, which is typical of a bar magnet's magnetic field (even when reversed, the overall pattern of field lines around a bar magnet is similar in symmetry, just the pole directions change, but the iron filings arrange along field lines). Option B has clumps, D is random, C is less spread. So the correct pattern is A.

Answer:

A. The pattern with iron filings forming a symmetrical pattern around the magnet (the first option with filings spreading out from the magnet's center area in a radial - like symmetrical way)