323 questions in Class 12th Physics - HI MCQ!

A bar magnet is cut into two equal halves by a plane parallel to the magnetic axis. Of the following physical quantities the one which remains unchanged is?

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The material suitable for making electromagnets should have?

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On cutting a solenoid in half, the field lines remain ……….. emerging from one face of the solenoid and entering into the other face.?

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S is the surface of a lump of magnetic material.?

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At magnetic poles, the angle of dip is?

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In a permanent magnet at room temperature?

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Susceptibility is positive and large for a?

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Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator?

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Hysterisis is the phenomenon of lagging of?

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The hystersis curve is studied generally for?

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