# Detect variantion of magnetic moment

1. Oct 6, 2008

### jorgen

hi all,

I have to determine if a magnometer is able to detect variation of a magnetic moment. I am given the following observations:

n = 2.7* 1021 (number of particles)
mu = 2*10-20Am2
detection limit = 10-19

than I am given the variance of the magnetic moment as

$$\sigma^2(m) = \frac{2}{3}\mu^2$$

The question is can the variations in the magnetic moment be detected?

I am a little bit lost how to proceed - any hints or advise appreciated

Best
J
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