Question

Why does the number of magnetic field lines entering a closed surface equal the number leaving it?

विकल्प

• Magnetic field lines form closed loops

• Magnetic flux is a scalar quantity

• A larger surface allows more field lines to pass through it

• Flux depends on \[\cos\theta\]

Answer 1

Magnetic field lines form closed loops. Consequently, lines entering a closed surface also leave it, giving zero net flux.