If the current in each wire is the same, which wire produces the strongest magnetic field? a wire that is 1 mm thick and not coiled

a wire that is 2 mm thick and not coiled

a 1-mm-thick coiled wire with ten loops

X a 2-mm-thick coiled wire with two loops

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?