When a current of 1 ampere is passed in a coil lying in the

Last updated: 6/27/2023

When a current of 1 ampere is passed in a coil lying in the magnetic meridian then a magnetic needle at its centre gives some deflection If the current in the coil is increased to g ampere then at what distance from the centre of the coil will the deflection of needle remains unchanged 1 2R 2 4R 3 8R 4 R