6.If the field at the centre of a coil of radius 8 cm having 80 turns is 200 A-turn/m, then the current passing through it is

7.the two turn coil of a tangent galvanometer

8.The deflection magnetometer is constructed such that the centre of the magnetic needle

9.Plane of the tangent galvanometer is set along the magnetic meridian because in that case the field due to current is

10.The field at the centre of a coil of radius 16 cm having 10 turns and carrying a current of 8 A is