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folgorant
Apr12-08, 05:43 AM
Hi all!

1. The problem statement, all variables and given/known data

The problem is:

For a particle with electric charge equal to that of one electron, the trajectory radius R is related to the absolute value of the perpendicular component P_{\bot}of the relativistic moment perpendicular to \textbf{B} from the relation:

P_{}^{} (MeV/c) = 3.00 \times10^{-4} BR (Gauss \times cm)

2. Relevant equations

I know that:

1Tesla=10^4Gauss
1Coulomb=3x10^9Gauss
1m=10^2cm

3. The attempt at a solution

So:

\textbf{F}=q\textbf{v}\times\textbf{B}

\textbf{F}_{\bot}=\frac{mv^2}{R}=qvB

\textbf{P}_{\bot}= qBR

where on the left side I transform P in MeV/c units obtaining a new value of P,
and on the right side I have qBR initially in Coulomb x Tesla x m.
So

qBR= (1.6 \times 10^{-19} \times 3\times10^9) (B \times 10^4 )(R \times 10^2)= 4.8 \times 10^{-4} (Gauss^2 \times cm)

....who can find the error??? please help!!

pam
Apr12-08, 07:24 PM
"1Coulomb=3x10^9Gauss" is wrong.

folgorant
Apr13-08, 03:43 AM
okay, it's 1 Coulomb = 3 x 10^9 esu (or Cstat)

but the problem is not solved!!!