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The magnetic field (dB) due to a small e...

The magnetic field (dB) due to a small element. (dl) at a distance `(vecr)` and element carrying current I is

A

`dvecB=(mu_(0))/(4pi)i((dveclxxvecr)/r)`

B

`dvecB=(mu_(0))/(4pi)i^(2)((dveclxxvecr)/(r^(2)))`

C

`dvecB=(mu_(0))/(4pi)i^(2)((dveclxxvecr)/r)`

D

`dvecB=(mu_(0))/(4pi)i((dveclxxvecr)/(r^(3)))`

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-MOVING CHARGES AND MAGNETISM-EXERCISE-IA
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  2. Energy in a current carrying coil is stored in the form of

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  4. A current loop consists of two identical semicircular parts each of ra...

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  5. Two similar coils of radius R are lying concentrically with their plan...

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  6. An electron moving in a circular orbit of radius r makes n rotations p...

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

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  8. A circular loop of radius R, carrying current I, lies in xy plane with...

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  11. B along the axis of a long solenoid is given by

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  12. Which of the following particle will have minimum frequency of revolut...

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  13. An insulating rod of length l carries a charge q distributed uniformly...

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  15. A flat coil carrying a cuJTent has a magnetic moment μ . It is initial...

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  16. Arrange the following in asending order of magnetic induction at a poi...

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  17. Imagine a man swimming along a current carrying conductor in a directi...

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  18. Statement (A) : Ampere's law states that the line integral of vecB.vec...

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  19. Which one of the following graphs, shows the variation of magnetic ind...

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