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A superconductor exhibits perfect :
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Important Questions on Matter and Magnetism
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A frog can be levitated in magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behave as
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Liquid oxygen remains suspended between the two pole faces of a magnet because it is
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Among the following properties describing diamagnetism, identify the property that is wrongly stated.
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Correct relation between magnetic field , Magnetic intensity and magnetism is :-
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Relative primitivity and permeability of a material are and µr respectively.Which of the following values of these quantities are allowed for a diamagnetic material :-
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Assertion: Basic difference between an electric line and magnetic line of force is that former is discontinuous and the latter is continuous or endless.
Reason: No electric lines of forces exist inside a charged conductor but magnetic lines do exist inside a magnet.
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Assertion: In high latitude, one sees colourful curtains of light hanging down from high altitudes.
Reason: The high energy charged particles from the sun are deflected to polar regions by the magnetic field of the earth.
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Assertion : A linear solenoid carrying current is equivalent to a bar magnet.
Reason : The magnetic field lines due to current carrying solenoid resemble exactly with those of a bar magnet
