Q. Earth's magnetic field is

 1388  215 Delhi UMET/DPMTDelhi UMET/DPMT 2008Magnetism and Matter Report Error

Solution:

It has been established that earth's magnetic field is fairly uniform. The strength of this field at the surface of earth is approximately tesla or 1 gauss. The field is not confined only to earth's surface. It extends upto a height nearly 5 times the radius of earth.