A singly ionized 24 Mg ion (mass 3.983 10 -26 kg) is accelerated through a 2.2 k
ID: 2144627 • Letter: A
Question
A singly ionized 24Mg ion (mass 3.983 10-26 kg) is accelerated through a 2.2 kV potential difference and deflected in a magnetic field of 530 G in a mass spectrometer.
(a) Find the radius of curvature of the orbit for the ion.
_____________cm
(b) What is the difference in radius for 26Mg and 24Mg ions? (Assume that their mass ratio is 26/24.)
__________________cm
Explanation / Answer
r= mV/qB
but 1/2*m*v^2=qV
so v^2=2qV/m
thus
r= m*root(2qV/m)/qB
r= root(2mV/q)/B