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Chapter 32 Maxwell’s equations; Magnetism in matter In this chapter we will discuss the following topics: -Gauss’ law for magnetism -The missing term from Ampere’s law added by Maxwell -The magnetic field of the earth -Orbital and spin magnetic moment of the electron -Diamagnetic materials -Paramagnetic materials -Ferromagnetic materials (32 – 1)

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The magnetic flux through each of five faces of a die (singular of ''dice'') is given by Φ B = ±N Wb, where N (= 1 to 5) is the number of spots on the face. The flux is positive (outward) for N even and negative (inward) for N odd. What is the flux (in Wb) through the sixth face of the die? A.1B.2C.3D.4E.5

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Fig.a Fig.b (32 – 2)

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ΔAiΔAi (32 – 3)

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R r B O (32 – 9)

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N S Fig.b : Side view horizontal Compass needle N S Fig.a : Top view Geographic North Compass needle (32 – 12)

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(32 – 17). C e. C e.

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(32 – 18). C e. C e.

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