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Biot-Savart law indicates that the movin...

Biot-Savart law indicates that the moving electrons (velocity `vecv`) produce a magnetic field `vecB` such that

A

`vecB` is at right angles to `vecv`

B

`vecB` is parallel to `vecv`

C

It obeys inverse cube law

D

It is along the line joining the electron and point of observation.

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The correct Answer is:
A
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