A coil of one loop is made by a wire of length L and there

Last updated: 6/9/2023

A coil of one loop is made by a wire of length L and there after a coil of two loops is made by same wire The ratio of magnetic field at the centre of coils respectively 1 1 4 2 1 1 3 1 8 4 4 1 Magnetic field at point O will be