The closed wire loop shown in the figure carries a current of 9
A counterclockwise. The radius of the outer arc is 49 cm and that of the
inner 29 cm. Determine the magnetic field (modulus, and direction) at
point P.
Help: The magnetic field created by a wire loop arc can be calculated as a
fraction (function of the angle) of that created by the entire wire loop of
the same radius.