a) What would be in m/s the velocity of the ions that move in a straight horizon

Question

a) What would be in m/s the velocity of the ions that move in a straight horizontal line when moving through the velocity selector?

b) What would be in meters the radius of the path of the ions when moving through the Deflection Chamber if they hit the detector at a distance of 0.718m from the entrance of the deflection chamber?

c) What is the sign of the charge of the ions if they follow the path shown in the Figure?
negative   positive    both negative and positive ions would follow that same path

d) What is in kg the mass of the ions that hit the detector  at a distance of 0.718m from the entrance of the deflection chamber?

Explanation / Answer

a) Apply, q*v*B = q*E

v = E/B

= 2600/(39*10^-3)

= 6.67*10^4 m/s

b) r = d/2

= 0.718/2

= 0.359 m

c) positive

d) Apply, m*v^2/r = q*v*B

m = B*q*r/v

= 21*10^-3*1.6*10^-19*0.359/6.67*10^4

= 2.757*10^-26 kg

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