Question

writing to Biot savart law and identity the symbol used.​

Answer 1

Answer:

your answr is refer to this attachment...

Answer 2

Hi there,

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your question deals with magnetism due to current.....

the biot savart law states that the magnitude magnetic field induced by a current (i.e any moving charge) is directly proportional to mainly factors :

1) the magnitude of charge         : q

2) its velocity                                : v

3) the sin of the angle the velocity vector makes with the imaginary line joining the point where we need to find mag. field and the charge

sin Ф

...

⇒

[magnetic field intensity] B ∝ q . v . sinФ

and as charge moves through a conductor of free electron density n,

we can derive from the above proportionality, the biot-savart law, by considering a current element (dl)

                B ∝ k i dl sin Ф /r²

k =constant of proportionality (permeability)    μ/4π  where μ = 4π x 10^-7

i= current

dl=current element

r²= distance of point from current element

 

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cheers