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

Question

Biot-Savart law indicates that the moving electrons (velocity vecv ) produce a magnetic field vecB such that (A)  vecB ⊥ vecv (B)  vecB || vecv (C) it obeys inverse cube law (D) it is along the line joining the electron and point of observation

Tardigrade Admin · Accepted Answer

Magnetic field produced by charges moving with velocity vecv, at a distance r is vecB = ((μ0/4π))⋅ q( vecv× hatr/r2). Therefore vecB ⊥ vecv.

Q. Biot-Savart law indicates that the moving electrons (velocity $v$ ) produce a magnetic field $B$ such that

$B ⊥ v$

$B ∣∣ v$

it obeys inverse cube law

it is along the line joining the electron and point of observation

Magnetic field produced by charges moving with velocity $v$ , at a distance $r$ is
$B = (\frac{μ _{0}}{4 π}) \cdot q \frac{v \times r ^}{r ^{2}}$ .
Therefore $B ⊥ v$ .

Q. Biot-Savart law indicates that the moving electrons (velocity v ) produce a magnetic field B such that

B⊥v

B∣∣v