Very long straight wire carries current 15 A. In the middle of the wire a right-angle bend is made. The bend forms an arc of a circle of radius 27 cm, as show. Determine the magnetic field at the center of the arc.

your question is missing the figure which I have attached below;

Tesla.

Explanation:

Using Biot-Savart law

μ

as we know from the figure that cure 1/4 of the circle so integrating the above equation from 0 to 2pi and then dividing it by 4 we get;

Also we know that magnetic field in the length of a wire is

in the figure there are two parts as length other than curve part so for both parts the sum of magnetic field will be

Now the total magnetic field is given as

putting values we get

so

solving above equation we get

Tesla.

i believe your answer is d mgf2

a electromagnetic waves