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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

`bar(dB) = mu_0/(4π) i([bar(dl)×bar(r)]/r)`

B

`bar(dB) = mu_0/(4π) i^2([bar(dl)×bar(r)]/r)`

C

`bar(dB) = mu_0/(4π) i([bar(dl)×bar(r)]/r^2)`

D

`bar(dB) = mu_0/(4π) i([bar(dl)×bar(r)]/r^3)`

Text Solution

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The correct Answer is:
D
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