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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.

Text Solution

Verified by Experts

The correct Answer is:
A
In Biot-savart's law, magnetic field `B||dlxxr` and idl due to flow of electron is in opposite direction of v and by direction of cross product of two vectors.
`B vot v`
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