The magnetic field due to a 2-A current flowing in a long, straight wire is 8uT

Question

The magnetic field due to a 2-A current flowing in a long, straight wire is 8uT at the point P, a certain distance away from the wire. How far is the point from the center of the wire? A) 2cm B) 3cm C) 4cm D) 5cm E) 6cm

PLEASE SHOW WORK. Thanks The magnetic field due to a 2-A current flowing in a long, straight wire is 8uT at the point P, a certain distance away from the wire. How far is the point from the center of the wire? A) 2cm B) 3cm C) 4cm D) 5cm E) 6cm

PLEASE SHOW WORK. Thanks A) 2cm B) 3cm C) 4cm D) 5cm E) 6cm

PLEASE SHOW WORK. Thanks

Explanation / Answer

Given B= 8 T , I=2A

Use equation,

B= 0I/2r

r= 0I/2B

Plug given values,

r= (4*10^-7*2)/(2**8*10^-6) = 0.05m = 5cm

Correct choice = D) 5cm

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