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

Concept of a magnetic field — practice question

For diagnosis by nuclear magnetic resonance imaging (NMRI), a non-uniform magnetic field is placed on top of a strong constant magnetic field. Explain the purpose of:
(a)[2]

the strong constant magnetic field.

(b)[2]

the magnetic field with non-uniform strength.

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This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “the process of nuclear precession” …

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