alleryFor a closed surface in a magnetic field, lines leaving equal lines:
AStarting
BEntering
CTurning
DStopping
Answer & Solution
Correct answer: B. Entering
1. Magnetic field lines never start or stop inside the surface.
2. Every line that goes out must have come in.
3. So lines leaving equal lines entering.
_Source: syllabus Physics Part I, Chapter 5, Magnetism and Matter._
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