a circular coil 5 turns and of 10cm mean diameter is connected avoltage source. if the resisitance is 10 omh , the voltage of the source so as to nullify the horizontal component of earths magnetic field of the horizontal component of earths magnetic field of 30 A turn m^-1 at the centre of the coil should be

Asked by kvunni hj | 10th Sep, 2014, 10:15: PM

Expert Answer:

To nullify the horizontal component of earth's magnetic field, the current must be passed through the coil. For that the plane must be kept perpendicular to the magnetic meridian.
Given:
N=5 turns
D=10 cm
r=5 cm=0.05 m
BH=30 T (A turn m-1)
R=10 Ω


 

Answered by Priyanka Kumbhar | 11th Sep, 2014, 12:37: PM