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The relative permeability of a substance is , the substance 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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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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In a superconductor, critical magnetic field
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A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains:
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Which one of the following characteristics is not associated with a paramagnetic material?
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In a ferromagnetic material, below the curie temperature, a domain is defined as:
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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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A solenoid having turns per meter has a core of area and relative permeability It carries a current of The which statement among the following is true ?
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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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A paramagnetic sample shows a net magnetization of when placed in an external magnetic field of at a temperature of . When the same sample is placed in an external magnetic field of at a temperature of . The magnetization will be
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Classify the following materials with regard to magnetism: Manganese, cobalt, Nickel, Bismuth, Oxygen, Copper.
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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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A substance is placed in a non-uniform magnetic field. It experiences weak force towards the strong field. The substance is type
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The correct definition of Meissner effect is
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Which of the following materials is paramagnetic at
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The susceptibility of a magnetic material is . Identify the type of magnetic material. Draw the modification of the field pattern on keeping a piece of this material in a uniform magnetic field.
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Write three points of differences between para, dia, and ferromagnetic materials, giving one example for each.
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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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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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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-
