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The magnetic susceptibility for diamagnetic material is
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Important Questions on Matter and Magnetism
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The magnetic susceptibility is negative for:
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A paramagnetic material has . Its magnetic susceptibility at temperature is . Its susceptibility at is
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Magnetic materials used for making permanent magnets and magnets in a transformer have different properties of the following, which property best matches for the type of magnet required?
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Above the curie temperature the susceptibility of a ferromagnetic substance varies
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Nickel combines with a uninegative monodentate ligand to form a diamagnetic complex The hybridisation involved and the number of unpaired electrons present in the complex are respectively:
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The meniscus of a liquid contained in one of the limbs of a narrow U -tube is placed between the poles of an electromagnet with the meniscus in a line with the field. The liquid is seen to rise to the line. This indicate that the liquid is ___ .
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Which one of the following characteristics is not associated with a paramagnetic material?
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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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Hysteresis loops for two magnetic materials and are given below:
These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use:
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The figure gives experimentally measured vs. variation in a ferromagnetic material. The retentivity, coercivity and saturation, respectively, of the material are:
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The magnetic susceptibility of a paramagnetic substance at is . To have the susceptibility , the change in temperature in is
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Consider the regular array of vertical identical current-carrying wires (with the direction of current flow as indicated in the figure below) protruding through a horizontal table. If we scatter some diamagnetic particles on the table, they are likely to accumulate-
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Substances, when placed in a magnetic field acquire feeble magnetisation in the direction opposite to that of the applied field are called
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A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field . Then the field inside the paramagnetic substance is:
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Needles and are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet, when brought close to them, will
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The correct definition of Meissner effect is
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In a superconductor, critical magnetic field
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Coercivity of a magnet where the ferromagnet gets completely demagnetized is . The minimum current required to be passed in a solenoid having turns per metre, so that the magnet gets completely demagnetized when placed inside the solenoid is
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An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity , the magnetic field inside the superconductor will be such that
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The coercivity of a small magnet, where the ferromagnet gets demagnetised is . The current required to be passed in a solenoid of length and number of turns , so that the magnet gets demagnetised when inside the solenoid is
