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What current must be passed through a vertical coil of 50 turns of average radius 8 cm in order to neutralize the horizontal component of the earth's field (15 A`m^(-1)` at its center?

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The correct Answer is:
0.048 A
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NN GHOSH-MAGNETIC EFFECT OF CURRENT-Exercises
  1. A current element of strength 2xx10^(-4) Am is at the corner A of a cu...

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  2. Two current elements of strengths 0.2 Am 0.4A m from a cross at the ce...

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  3. What current must be passed through a vertical coil of 50 turns of ave...

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  4. A circular loop of 100 turns and radius 10 cm is placed witih its plan...

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  5. A coil of 50 turns and radius 10 is placed with its plant at right ang...

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  6. Calcualte the current in amperes through a circular loop of 40 turns a...

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  7. A circular coil has 63 turns, each of radius 22cm. It is placed in the...

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  8. A circular coil with 10 turns of mean radius 10 cm is placed in the ma...

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  9. A current of 0.1A passes through a circular coil, 15 cm in diameter an...

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  10. Calculate the magnetic field at the center of a regualr hexagon, 10 cm...

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  11. Two long, straight parallel conductors each carrying 2A current in the...

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  12. Calculate the magnetic field at the orthocenter of an equilateral tria...

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  13. Calculate the magnetic field at the corner of a right angled triangle ...

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  14. The circular coil of tangent galvanometer is set at right angles to th...

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  15. A long thin wire is placed along the y-axis (just outside) of a frame ...

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  16. A circular loop of radius 10 cm carries a current of 15A. At its cente...

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  17. Two long straight conductors carrying current I are located at the cor...

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  18. A thin disc of dielectric material, with a total charge +q distributed...

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  19. A conductor of lengh l is placed in the east-west line on a table. Sud...

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  20. A long wire is bent into the shape shown in the figure. Without cross-...

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