Question

In earth magnetic field bh if the frequency of oscillation of a magnetic needle is n then

Answer 1

10,000 guass is magnetic frequency of the needle n in earth

Answer 2

Hey dear,
This is an incomplete question.

● Complete question with options -
Q. In earth's magnetic field Bh, if the frequency of oscillation of a magnetic needle is n then -
(A) n ∝ Bh
(B) n^2 ∝ Bh
(C) n ∝ Bh^2
(D) n^2 ∝ 1/Bh

● Answer -
(B) n^2 ∝ Bh

● Explaination -
Frequency if oscillation of magnetic needle is given by -
n = (1/2π) √(MBh/I)

Thus,
∴ n ∝ √Bh
∴ n^2 ∝ Bh

Hope this helps you...