JEE PHYSICS MCQ: MAGNETISM AND MATTER

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In a ferroelectric material, as the applied field is gradually reduced to zero, the polarization still left is known as

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Correct option: A

remanent polarization

Option A (remanent polarization) is correct because remanent polarization is the polarization that remains in a ferroelectric material after the applied electric field is removed.

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Curie temperature is the one above which A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is

{2^{5/4}}

s. One of the magnets is removed and if the other magnet oscillates in the same field , then the time period in second is The relative permeability of a substance

X

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Y

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\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

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\mu_{\mathrm{f}}

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