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Magnetism And Matter

Question
CBSEENPH12039603
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Relative permittivity and permeability of a material are εr and µr, respectively. Which of the following values of these quantities are allowed for a diamagnetic material?

  • εr = 0.5, µr = 1.5

  • εr = 1.5, µr = 0.5

  • εr = 0.5, µr = 0.5

  • εr = 1.5, µr = 1.5 

Solution

B.

εr = 1.5, µr = 0.5

Some More Questions From Magnetism and Matter Chapter

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The earth's magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?

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The earth's core is known to contain iron. Yet geologists do not regard this as a source of the earth's magnetism. Why?

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The charged currents in the outer conducting regions of the earth's core are thought to be responsible for earth's magnetism. What might be the ‘battery’ (i.e., the source of energy) to sustain these currents?

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The earth may have even reversed the direction of its field several times during its history of 4 to 5 billion years. How can geologists know about the earth's field in such distant past?

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The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?

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