AP Physics C E&M 12.1.B Magnetic Dipole Behaviour

Practise analysing a compass as a magnetic dipole in a uniform field by distinguishing its alignment from the net magnetic force on the needle.

Exam points

Distinguish dipole alignment in a uniform magnetic field from the zero net force on a compass needle.

[Maximum number: 1]

A compass needle is in a uniform magnetic field B with its north-seeking pole pointing in the direction of the field. The net magnetic force on the compass needle is

in the direction of B

in the direction of -B

perpendicular to the plane determined by $\mathbf{B}$ and the needle

in the same plane as B and the needle, but perpendicular to the needle

zero

Figure for Question 12.1.B—Describe the magnetic behavior of a material as a result of the configuration of magnetic dipoles in the material question 1 — AP Physics C: Electricity & Magnetism

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12.1.B—Describe the magnetic behavior of a material as a result of the configuration of magnetic dipoles in the material question 1