Electromagnetism — Question 254

ANSWER

(a) Outside lines leave N and enter S; inside they return from S to N; the complete lines are closed loops.

Worked solution

(a) Magnetic field lines do not start or end at isolated magnetic charges. Exterior arrows run from left N to right S. Within the magnet they run from right S to left N to close the loops.

Equivalent physically justified methods, alternative valid sketches and consistent units accepted.

Accept sensible significant figures and consistent rounding from stated constants.

Part a: Draw sensible exterior lines from N to S with arrowheads.

[1 mark]

Part a: Show interior direction from S to N.

[1 mark]

Part a: Represent continuous noncrossing closed loops.

[1 mark]

Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.