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A regular polygon of n sides is formed b...

A regular polygon of n sides is formed by bending a wire of total length `2 pi r` which carries a current i. (a) Find the magnetic field B at the centre of the polygon. (b) By letting `n rarr oo` , deduce the expression for the magnetic field at the centre of a circular current.

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DC PANDEY ENGLISH-MAGNETIC FIELD AND FORCES-Medical entrance s gallery
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  2. A long wire carries a steady curent . It is bent into a circle of one ...

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  3. An electron is moving in a circular path under the influence fo a tran...

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  4. A square loop ABCD, carrying a current I(2) is placed near and coplan...

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  5. A long staright wire of radius a carries a steady current I. The cure...

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  6. A wire carrying current I has the shape as shown in the adjoining ...

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  8. Consider the circular loop having current I nad with central point O....

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  9. A proton is projected with a speed of 3X10^6 ms ^(-1) horizontally fro...

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  10. The magnetic field at the centre of a circular coil carrying current I...

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  11. Two parallel wires are carrying electric currents of equal magnitude a...

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  12. The variation of magnetic field (B) due to circular coil as the distan...

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  13. Two particles X and Y with equal charges, after being accelerated thro...

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  14. There is a ring of radius r having linear charge density lambda and ro...

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  15. Two particles A and B having equal charges +6C, after being accelerate...

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  16. A proton beam enters magnetic field of 10^(-4) "Wb//m^(2) normally. If...

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  17. Cyclotron is used to accelerate

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  18. Two parallel beams of positrons moving in the same direction will

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  19. Two concentric coils each of radius equal to 2 pi cm are placed at rig...

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  20. A conducting loop is placed in a uniform magnetic field with its plane...

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  21. A solenoid has length 0.4m, radius 1 cm and 400 turns of wire. If a cu...

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