Physics 9702 · AS & A Level · Concept of a magnetic field

Concept of a magnetic field — practice question

Magnetic resonance imaging (MRI) uses a non-uniform magnetic field superimposed on a large uniform magnetic field. State and explain the purpose of
(a)[3]

the strong uniform magnetic field.

(b)[3]

the magnetic field that is non-uniform.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: Nuclei spin / precess around the direction of the magnetic field

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