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A current - carrying circular coil of 100 turns and radius 5.0 cm produces a magnetic field of `(6.0 xx 10 ^-5)` T at its centre. Find the value of the current.

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`B=(mu_0ni)/(2R)`
`6.0xx10^(-7) = (4pixx10^(-7)xx10^2xxxi)/(2xx5xx10^(-2)`
`I = (60xx10^(-7)/(4pixx10^(-7)xx10^2A)`
`=4.777xx10^(-2)A`
`=47.77xx10^(-3) A ~~ 48 mA`
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HC VERMA-MAGNETIC FIELD DUE TO CURRENT-Exercises
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  7. If the outer coil of the precious problem is rotated through 90^@ abo...

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  11. Find the magnetic field B due to a semicircular wire of radius 10.0 cm...

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  13. A circular loop of radius r carries a current i. How should a long , ...

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  14. A circular coil of 200 turns has a radius of 10 cm and carries a curre...

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  15. A circular loop of radius 4.0 cm is placed in a horizontal plane and c...

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  16. A charge of (3.14 xx 10^-6) C is distributed uniformly over a circular...

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  17. A thin but long, hollow, cylindrical tube of radius r carries a curre...

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  18. A long, cylindrical tube of inner and outer radii a and b carries a cu...

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  19. A long, cylindrical wire of radius b carries a current i distributed u...

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  20. A solid wire of radius 10 cm carries a current of 5.0 A distributed un...

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