Two very long straight wires each carrying a current I are placed at r_1^{\to} = lj^{\^} and r_2^{\to} = -lj^{\^}. The wires carry the current out of page (in k^{\^} direction). If the magnitude of magnetic field due to current hi wires at point r_3^{\to} = 2li^{\^ } is |B^{\to}| = \alpha({\mu_0I}/l), then the value of constant α is (\mu_0 is the magnetic permeability)

TS EAMCET Medical 8 May 2019 Shift 2 Paper

Question : 109 of 159

Marks: +1, -0

Two very long straight wires each carrying a current I are placed at

→

= l

and

→

= −l

. The wires carry the current out of page (in

direction). If the magnitude of magnetic field due to current hi wires at point

→

= 2l

is |

→

| = α(

µ0I

), then the value of constant α is
(µ0 is the magnetic permeability)

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