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Two small bar magnets are placed in a li...

Two small bar magnets are placed in a line with like poles facing each other at a certain distance d apart. If the length of each magnet is negligible as compared to d, the force between them will be inversely proportional to

A

`d ^(2)`

B

`d `

C

`d ^(3)`

D

`d ^(4)`

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-MAGNETISM AND MATTER -ASSIGNMENT (SECTION A)
  1. Figure shows two identical magnetic dipoles a and b of magnetic moment...

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  2. Two short magnets of equal dipole moments M are fastened perpendicular...

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  3. Two small bar magnets are placed in a line with like poles facing each...

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  4. A magnetic needle lying parallel to a magnetic field requires X units ...

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  5. Potential energy of a bar mangnet of magnetic moment M placed in a mag...

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  6. A magnetic dipole is placed at right angles to the direction of lines ...

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  7. Which of the following statements regarding magnetic lines of force is...

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  8. A thin magnetic needle oscillates in a horizontal plane with a period ...

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  9. The time period of a freely suspended magnet is 4 secs. If it is broke...

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  10. The magnetic moments of two bar magnets of same size are in the ratio ...

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  11. Magnetostatic screening or shielding can be created by

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  12. Planets producing larger magnetic field have larger

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  13. To shield an instrument from external magnetic field, it is placed ins...

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  14. A dip needle lies initially in the magnetic meridian when it shows...

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  15. If a dip needle is suspended at an angle 30° to the magnetic meridian,...

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  16. A dip needle free to move in a vertical plane perpendiculr to the magn...

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  17. If theta(1) and theta(2) be the apparent angles of dip observed in two...

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  18. How many neutral points will be obtained when a bar magnet is kept wit...

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  19. Time period of cillations of a magnet of magnetic moment M and moment ...

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  20. A magnet is suspended in such a way that it oscillates in the horizont...

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