alleryStart learning →Besides steering a particle beam, what other job do magnetic fields do inside a large particle accelerator?
ASlow the particles before impact
BFocus the particles into a beam
CAdd charge to the particles used
DConvert the beam into a current
Answer & Solution
Correct answer: B. Focus the particles into a beam
1. Magnetic fields control the direction of the charged particles in an accelerator.
2. They are also used to focus the particles into beams.
3. Focusing is needed because like charges in a beam repel one another and spread it out.
4. The magnetic force does no work, so it cannot slow the particles down or speed them up.
_Source: OpenStax College Physics (CC BY 4.0), Ch 22 "Magnetism", section 22.5 Force on a Moving Charge in a Magnetic Field: Examples and Applications_
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