What would the current be in a wire if a sensor located 2
meters away measures a magnetic field of 3 x 10-57?
Enter the answer

The value of the current in the wire is 300 A.

Explanation:

The current can be determined by;

       B =

Where: B is the magnetic field, I is the current, r id the distance between the wire and sensor and is a constant called the permeability of the free space.

From the given question, r = 2 m, B = 3 × T and   = 4 × × Tm

So that;

         I =

           = (2 × × 2 × 3 × ) ÷ (4 × × )

           = 300 A

The value of the current in the wire would be 300 A.

it is the second option.

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