A magnetic needle is arranged at the centre of a current carrying c
Channel: Doubtnut
Date: 2020-02-16

A magnetic needle is arranged at the centre of a current carrying coil having 50 turns with radius of coil `20 cm` arranged along magnetic meridian. When a current of `0.5mA` is allowed to pass through the coil the deflection is observed to be `30^(@)`. Find the horizontal component of earth\'s magnetic field