Advanced physics

Consider a pacemaker implant in which the leads travel close together from the device to the heart, then separate and connect to the top and bottom of the heart. The circuit completes through the middle of the heart, so take the area of the current loop to be half the $($approximately$)24$mm$2$cross$-$sectional area of the heart.

Assume that the magnetic field is constant inside the loop and equal to the value at the loop's center. Use this field to determine the magnetic flux through the loop, and hence estimate the stray self$-$inductance L $$of the loop.