Answer:
0.334 m
Explanation:
The magnetic field due to current in a straight thin wire, 
, is given by
where 
is the permeability of free spave with value 
and 
is the distance from the wire.
Substituting the values from the question,
<span>The plates make up Earth's outer shell, called the lithosphere. (This includes the crust and uppermost part of the mantle.) Churning currents in the molten rocks below propel them along like a jumble of conveyor belts in disrepair. Most geologic activity stems from the interplay where the plates meet or divide.</span>
