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A steel wire of length l has a magnetic moment M. It is bent into a semicircular arc. What is the new magnetic moment?

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SL ARORA-MAGNETISM-Based on (i) Earth s Magnetism (ii) magnetic field of a bar magnet
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  2. A ship is sailing due west according in Mariner's compass . If the del...

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  3. A ship is sailing due east according to Mariner's compass . If the dec...

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  4. The horizontal component of earth's magnetic field is sqrt3 times the ...

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  5. The ratio of the vertical component to the horizontal component of ear...

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  6. The horizontal component of the earth's magnetic field is 0.22 Gauss a...

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  7. Calculate earth's surface magnetic field at a place , where an angle o...

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  8. Find the value of the vertical components of earth's magnetic at a pla...

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  9. The vertical and horizontal components of earth's magnetic at a place ...

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  10. A vertical wire in which current is flowing produces a neutral point w...

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  11. A compass needle whose magnetic moment is 60Am^2 pointing geograhic no...

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  12. A magnetic needle free to rotate about the vertical direction (compass...

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  13. The true dip at a place is 30^(@) . What is the apparent dip when the ...

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  14. The values of the apparent angles of dip in two planes at right angles...

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  15. A dip circle lies initially in the magnetic meridian. If it is now rot...

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  16. A magnetic needle of length 10cm, suspended at its middle point throug...

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  17. A long bar magnet has a pole strength of 10 Am. Find the magnetic fiel...

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  18. Calculate the magnetic field due to a bar magnet 2cm long and having p...

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  19. A bar magnet of length 0.1 m has a pole strength of 50 Am . Calculate ...

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  20. A bar magnet has a length of 8cm. The magnetic field at a point at a d...

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  21. The magnetic moment of a current carrying loop is 2.1xx10^(-25) ampxxm...

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