Physics, 28.10.2019 22:31 nautiannaharper5891
What do the positive helium ions do for the e / m apparatus? choose the most complete, best answer.
a. they are there only when the electrons are not orbiting, otherwise, they move to the outer edge of the bulb.
b. they are there so that the bulb does not implode.
c. they emit photons which allow the beam to be seen.
d. they get hot and glow.
e. they focus the electron beam.
f. they focus the electron beam and they emit photons which allow the beam to be seen.
2. when is a charge acted upon by a magnetic force?
Answers: 1
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What do the positive helium ions do for the e / m apparatus? choose the most complete, best answer....
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