Ts Eamcet
Moving Charges And Magnetism
TS EAMCET 2020 (Online) 11th September Morning Shift
MCQ+1 / -02020
A coil having 100 turns is wound tightly in the form of a spiral with inner and outer radii 1 cm and 2 cm , respectively. When a current 1 A passes through the coil, the magnetic field at the centre of the coil is