Two particles, each of mass m and charge q, are attached to the two ends of a massless rigid rod of length 2R. The rod is rotated at constant angular speed about a perpendicular axis passing through its centre. The ratio of the magnitudes of the magnetic moment of the system and its angular momentum about the centre of the rod is :-
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The materials suitable for making electromagnets should have :-
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The universal property among all substances is:-
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A magnetic substance has susceptibility –0.05 at 300 K. The magnetic susceptibility of the
substance at 600 K wili be :-
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Magnetic susceptibility of the following is :
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Diamagnetic substances characterise by :-
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