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The magnetic field dB due to a small ele...

The magnetic field dB due to a small element at a distance r and 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
  1. A current carrying coil is subjected to a uniform magnetic field. The ...

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  2. Energy in a current carrying coils is stored in the form of (a) elec...

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  3. The magnetic field dB due to a small element at a distance r and carry...

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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 x-y plane wit...

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  9. A positively charged disk is rotated clockwise as shown in Fig. The di...

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  10. A proton of mass m and charge q enters a magnetic field B with a veloc...

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  11. The correct curve between the magnetic induction (B) along the axis of...

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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 I carries a charge q distrubuted uniformly...

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  14. Two similar coaxial coils, separated by some distance, carry the same ...

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  15. A magnetic dipole with magnetic moment M is placed at right angles to ...

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

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  17. The magnetic field in a straight current carrying conductor wire is:

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

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  19. Which of the following graphs represent variation of magnetic field B ...

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  20. A current flows in a conductor from east to west. The direction of the...

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