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The magnetic field dvecB due to a small ...

The magnetic field `dvecB` due to a small current element `dvecl` at a distance `vecr` and element carrying current `i` is,

A

`vec(dB)=(mu_(0))/(4pi)i^(2)((vec(dl)xxr)/r)`

B

`vec(dB)=(mu_(0))/(4pi)I ((vec(dl)xxvecr)/(r^(3)))`

C

`vec(dB)=(mu_(0))/(4pi)((vec(dl)xxvecr)/r)`

D

`vec(dB)=(mu_(0))/(4pi)i^(2)((vec(dl)xxvecr)/(r^(2)))`

Text Solution

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The correct Answer is:
B
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