R Problem 1 8 A thin insulated wire form a spiral of N 100

Last updated: 6/25/2023

R Problem 1 8 A thin insulated wire form a spiral of N 100 turns carrying a current of i 8mA The inner and outer radii are equal to a 5cm and b 10cm Find the magnetic field at the centre of the coil Solution Let n no of turns per unit length along the radial of spiral Consider a ring of radii x and x dx N ndy n