- #36
moenste
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cnh1995 said:
Maybe it's e E = B e v?gneill said:
cnh1995 said:First term is incorrect. And the charge should be q instead of e since the ion is not an electron.
Maybe it's e E = B e v?gneill said:e is commonly used to refer to the unit of elementary charge though, so it actually works in this case. I'd be more picky about this if the ions involved had a different charge than a single elementary charge.
Right. So how would you proceed then?moenste said:Maybe it's e E = B e v?
Yes, that is a valid expression of the condition that the magnitude of the electric force balances the magnitude of the magnetic force on the moving charge. The result of course is no net force, so no deviation.moenste said:Maybe it's e E = B e v?
E = B v = 0.1 * 100 = 10 V, not 0.1 V.cnh1995 said:Right. So how would you proceed then?
That is the expression for electric field, not voltage. How is electric field related to voltage?moenste said:E = B v = 0.1 * 100 = 10 V, not 0.1 V.
moenste said:E = B v = 0.1 * 100 = 10 V, not 0.1 V.
E = V / d?cnh1995 said:That is the expression for electric field, not voltage. How is electric field related to voltage?
Yes!moenste said:E = V / d?
Why do we need it? We need to find V and we don't know E.gneill said:Yes!
It's easy to remember because the units of E are volts/m.
You found E in post #39.moenste said:Why do we need it? We need to find V and we don't know E.
So, E = V / d, V = B v d = 0.1 * 100 * (10 / 10 / 100) = 0.1 V.gneill said:You found E in post #39.
Yes and yes.moenste said:So, E = V / d, V = B v d = 0.1 * 100 * (10 / 10 / 100) = 0.1 V.
How do we find the kinetic energy per ion?
KE = 0.5 m v2 = 0.5 * 1.67 * 10-27 * 1002 = 8.35 * 10-24 J?