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Theme D : Fields

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Fields

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A small area A is in a region of uniform magnetic field of strength B.

A rod made of conducting material is in a region of uniform magnetic field.

Theme D : Fields

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A small area A is in a region of uniform magnetic field of strength B. The field makes an angle to the normal to the area as shown below.

(a) With reference to the diagram, define magnetic flux both in words and in symbols.

[Marks: 3]

(b) A thin copper ring encloses an area of 1.8x10⁻³m^-2. The plane of the ring is normal to a uniform magnetic field. The magnetic field strength increases at a constant rate of 5.0 ×10^–2 Ts^–1.

Calculate the e.m.f. induced in the ring.

[Marks: 5]

8.7 x10^-5 V

9.0 x10^-5 V

7.2 x10^-5 V

8.4 x10^-5 V

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