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A frog can be levitated in a magnetic field produced bt a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as:

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Important Questions on Magnetism and Matter

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 24
When a ferromagnetic substance is heated to a temperature above its Curie temperature, it
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 25
Select the incorrect statement
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 26
Soft iron is used to manufacture electromagnets because their
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 27
Relative permeability of superconductors is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 28
The effective radius of a circular coil is R and number of turns is N. The current through it is i ampere. The work done in rotating the coil by angle of 180° in an external magnetic field B will be,
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 1
A short bar magnet of magnetic moment 10 A m2 is placed along x-axis at origin. The magnetic field at (5 m, 0) is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 2
The net magnetic flux through any closed surface is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 3
The coercivity of a small magnet where the ferromagnet gets demagnetized, is 103 A m-1. The current required to be passed in a solenoid of length 10 cm of turn 200, so that the magnet gets demagnetized when inside the solenoid, is