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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

`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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AAKASH INSTITUTE ENGLISH-MOVING CHARGE AND MAGNESIUM-SECTION C
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