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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

B is perpendicular to v

B

B is parallel to v

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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