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AP® Physics C: E & M

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Moderate

Gauss's Law for Magnetism

APPHEM-YSOMUW

One of Maxwell's Equations can be written as $\oint \mathbf{\vec{B}}\cdot d\mathbf{\vec{A}}=0$.

Which of the following statements follows directly from this statement? Select two answers.

A

Magnetic field lines must form closed loops.

B

Moving charges create magnetic field.

C

There exist no magnetic monopoles.

D

Magnetic field is directed away from the north pole of a bar magnet and toward the south pole.

E

Magnetic field strength decreases with increasing distance from the source.