- #1

rwooduk

- 762

- 59

## Homework Statement

## Homework Equations

Please see below.

3. The Attempt at a Solution

The idea is to find B

_{min}. We know: $$

\tau \frac{eB}{m}\gg 1 \\ \\

\rightarrow \frac{eB}{m}\gg \tau$$

__Points:__[1] We are given $$\tau \propto \frac{1}{T^{2}}$$ .

[2] We are also given a conversion factor $$\tau =10ns \ at \ 1K$$.

**Now, how would you use [1] and [2] to convert 300K?**

I'm assuming you can't just use [2] and do $$300K\cdot \frac{10ns}{1K} = 3X10^{-7}s$$ because of the non-linear relation given in [1].

Am I just confusing things?