JEE Main 201911 Jan, Evening shiftPhysicsMediumElectromagnetic Induction and Alternating Currents149× since 2002
A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear
dimension of each side of the frame is increased by a factor of 3, keeping the number of turns of the coil per
unit length of the frame the same, then the self inductance of the coil: