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What are permanent magnets?Give one exam...

What are permanent magnets?Give one example.

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Permanent magnets are those magnets made of ferromagnetic material with high retentivity and coercivity.For example steel.
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RESONANCE-ELECTRODYNAMICS-Exercise-3 PART-3
  1. Define magnetic susceptibility of a material.Name two elements one hav...

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  2. Magnetic field lines can be entirely confined within the core of a tor...

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  3. An electron does not suffer any deflection while passing through a reg...

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  4. (i) Write the expression for the magnetic moment (vecm) due to a plana...

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  5. A long straight wire of a circular cross-section of radius 'a' carries...

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  6. A beam of alpha particles projected along + x-axis, experiences a forc...

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  7. Deduce an expression for the magnetic dipole moment of an electron orb...

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  8. The permeability of magnetic material is 0.9983. Name the type of magn...

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  9. A magnetic needle free to rotate in a vertical plane parallel to the m...

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  10. (a)Using Ampere's circuital law,obtain the expression for the magnetic...

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  11. Write the expression for the force vecF, acting on a charged particle ...

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  12. What are permanent magnets?Give one example.

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  13. (a)Derive the expression for the torque on a rectangular current carry...

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  14. In given diagrams write the direction of magnetic field produced at po...

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  15. Write Biot-Savart law. Write the path of motion of an electron when ...

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  16. Write Ampere's circuital law.A long straight wire of a circular cross ...

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  17. Using the concept of force between two infinitely long parallel curren...

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  18. Show diagrammatically the behaviour of magnetic field lines in the pre...

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  19. If magnetic monopoles would have existed.how would the Gauss' law of m...

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  20. Derive and expression for the force per unit length acting on the two ...

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