Question

A magnetic needle ,free to rotate in a vertical palne,orients itself vertically at a certain place on the earth.what are the values of 1) horizontal components of earths magnetic field and 2)angle of dip of their place​

Answer 1

Answer:

Since the magnetic needle orients itself with its axis vertical, thus all the magnetic field must be in vertical direction and so horizontal component of earth's magnetic field must be zero.

Thus, angle of dip at that place is 90°