Question

At magnetic equator, a total intensity of earths magnetic field is Ie and at poles it is Ip they are related as
A)2Ip=Ie
B)Ip=2Ie
C)√3Ip=Ie
D)Ip=√3Ie​

Answer 1

Given:

1. The total intensity of the earth's magnetic field at equator = Ie

2. The total intensity of the earth's magnetic field at poles = Ip

To find:

Relationship between le and lp

Solution:

• The value of B (at pole lp) = k(2M/d³)

• The value of B (at equator le) = k( M/d³)

• Thus, lp = 2 le

• Therefore, option B) is correct i.e. lp = 2le